Physics for Scientists and Engineers with Modern Physics
4th Edition
ISBN: 9780131495081
Author: Douglas C. Giancoli
Publisher: Addison-Wesley
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 8, Problem 28P
(III) A skier of mass m starts from rest at the top of a solid sphere of radius r and slides down its frictionless surface. (a) At what angle θ (Fig. 8–36) will the skier leave the sphere? (b) If friction were present, would the skier fly off at a greater or lesser angle?
FIGURE 8–36
Problem 28.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
(1) A 1200 kg roller coaster cart is initially at rest at the top of the track at a height of 20 m above ground. (a) What is the speed of the roller coaster when it reached ground level? (assume no friction in this part of the track). (b) The roller coaster now continues to move horizontally. Find the distance the roller coaster will travel before arriving at a complete stop, if the coefficient of friction between the coaster and the track is 0.3.
20. A pendulum is launched from a point that is a height h
above its lowest point in two different ways (Fig. 8–28).
During both launches, the pendulum is given an initial speed
of 3.0 m/s. On the first launch, the initial velocity of the
pendulum is directed upward along
the trajectory, and on the second
launch it is directed downward
along the trajectory. Which
launch will cause the
highest speed when
the pendulum bob
passes the
lowest point
of its swing?
Explain.
(First launch)
FIGURE 8-28
(Second launch)
Question 20.
A softball having a mass of 0.25 kg is pitched horizontally at 120 km/h By the time it reaches the plate, it may have slowed by 10%. Neglecting gravity, estimate the average force of air resistance during a pitch. The distance between the plate and the pitcher is about 15 m.
Chapter 8 Solutions
Physics for Scientists and Engineers with Modern Physics
Ch. 8.2 - By how much does the potential energy change when...Ch. 8.4 - In Example 83, what is the rock's speed just...Ch. 8.4 - Two balls are released from the same height above...Ch. 8 - List some everyday forces that are not...Ch. 8 - You lift a heavy book from a table to a high...Ch. 8 - The net force acting on a particle is conservative...Ch. 8 - When a superball is dropped, can it rebound to a...Ch. 8 - A hill has a height h. A child on a sled (total...Ch. 8 - Why is it tiring to push hard against a solid wall...Ch. 8 - Analyze the motion of a simple swinging pendulum...
Ch. 8 - In Mg. 825, water balloons are tossed from the...Ch. 8 - A coil spring of mass m rests upright on a table....Ch. 8 - What happens to the gravitational potential energy...Ch. 8 - Experienced hikers prefer to step over a fallen...Ch. 8 - (a) Where does the kinetic energy come from when a...Ch. 8 - The Earth is closest to the Sun in winter...Ch. 8 - Can the total mechanical energy E=K+Uever be...Ch. 8 - Suppose that you wish to launch a rocket from the...Ch. 8 - Recall from Chapter 4, Example 414, that you can...Ch. 8 - Two identical arrows, one with twice the speed of...Ch. 8 - A bowling ball is hung from the ceiling by a steel...Ch. 8 - A pendulum is launched from a point that is a...Ch. 8 - Describe the energy transformations when a child...Ch. 8 - Describe the energy transformations that take...Ch. 8 - Suppose you lift a suitcase from the floor to a...Ch. 8 - Repeat Question 23 for the power needed instead of...Ch. 8 - Why is it easier to climb a mountain via a zigzag...Ch. 8 - Figure 829 shows a potential energy curve, U(x)....Ch. 8 - (a) Describe in detail the velocity changes of a...Ch. 8 - Name the type of equilibrium for each position of...Ch. 8 - (I) A spring has a spring constant k of 82.0 N/m....Ch. 8 - (I) A 6.0-kg monkey swings from one branch to...Ch. 8 - (II) A spring with k = 63 N/m hangs vertically...Ch. 8 - (II) A 56.5-kg hiker starts at an elevation of...Ch. 8 - (II) A 1.60-m tall person lifts a 1.95-kg book off...Ch. 8 - (II) A 1200-kg car rolling on a horizontal surface...Ch. 8 - (II) A particular spring obeys the force law F =...Ch. 8 - (II) If U=3x2+2xy+4y2z, what is the force, F?Ch. 8 - (II) A particle is constrained to move in one...Ch. 8 - (II) A particle constrained to move in one...Ch. 8 - (I) A novice skier, starting from rest, slides...Ch. 8 - (I) Jane, looking for Tarzan, is running at top...Ch. 8 - (II) In the high jump, the kinetic energy of an...Ch. 8 - (II) A sled is initially given a shove up a...Ch. 8 - (II) A 55-kg bungee jumper leaps from a bridge....Ch. 8 - (II) A 72-kg trampoline artist jumps vertically...Ch. 8 - The total energy E of an object of mass m that...Ch. 8 - (II) A 0.40-kg hall is thrown with a speed of 8.5...Ch. 8 - (II) A vertical spring (ignore its mass), whose...Ch. 8 - (II) A roller-coaster car shown in Fig. 832 is...Ch. 8 - (II) When a mass m sits at rest on a spring, the...Ch. 8 - (II) Two masses are connected by a string as shown...Ch. 8 - (II) A block of mass m is attached to the end of a...Ch. 8 - (II) A cyclist intends to cycle up a 9.50 hill...Ch. 8 - (II) A pendulum 2.00 m long is released (from...Ch. 8 - (II) What should be the spring constant k of a...Ch. 8 - (III) An engineer is designing a spring to be...Ch. 8 - (III) A skier of mass m starts from rest at the...Ch. 8 - (I) Two railroad cars, each of mass 56,000 kg, are...Ch. 8 - (I) A 16.0-kg child descends a slide 2.20 m high...Ch. 8 - (II) A ski starts from rest and slides down a 28...Ch. 8 - (II) A 145-g baseball is dropped from a tree 14.0...Ch. 8 - (II) A 96-kg crate, starling from rest, is pulled...Ch. 8 - (II) Suppose the roller-coaster ear in Fig. 832...Ch. 8 - (II) A skier traveling 9.0 m/s reaches the fool of...Ch. 8 - (II) Consider the track shown in Fig. 837. The...Ch. 8 - (II) A 0.620-kg wood block is firmly attached to a...Ch. 8 - (II) A 180-g wood block is firmly attached to a...Ch. 8 - (II) You drop a ball from a height of 2.0 m, and...Ch. 8 - (II) A 56-kg skier starts from rest at the top of...Ch. 8 - (II) How much does your gravitational energy...Ch. 8 - (III) A spring (k = 75 N/m) has an equilibrium...Ch. 8 - (III) A 2.0-kg block slides along a horizontal...Ch. 8 - (III) Early lest flights for the space shuttle...Ch. 8 - (I) For a satellite of mass mS in a circular orbit...Ch. 8 - (I) Jill and her friends have built a small rocket...Ch. 8 - Prob. 47PCh. 8 - (II) Show that Eq. 816 for gravitational potential...Ch. 8 - (II) Determine the escape velocity from the Sun...Ch. 8 - (II) Two Earth satellites, A and B, each of mass m...Ch. 8 - (II) Show that the escape velocity for any...Ch. 8 - (II) (a) Show that the total mechanical energy of...Ch. 8 - (II) Take into account the Earths rotational speed...Ch. 8 - (II) (a) Determine a formula for the maximum...Ch. 8 - Prob. 55PCh. 8 - (II) A meteorite has a speed of 90.0 m/s when 850...Ch. 8 - (II) How much work would be required to move a...Ch. 8 - (II) (a) Suppose we have three masses, m1, m2, and...Ch. 8 - (II) A NASA satellite has just observed an...Ch. 8 - (II) A sphere of radius r1 has a concentric...Ch. 8 - Prob. 61PCh. 8 - Prob. 62PCh. 8 - (I) If a car generates 18 hp when traveling at a...Ch. 8 - (I) An 85-kg football player traveling 5.0 m/s is...Ch. 8 - (II) A driver notices that her 1080-kg car slows...Ch. 8 - (II) How much work can a 3.0-hp motor do in 1.0 h?Ch. 8 - (II) An outboard motor for a boat is rated at 55...Ch. 8 - (II) A 1400-kg sports car accelerates from rest to...Ch. 8 - (II) During a workout, football players ran up the...Ch. 8 - (II) A pump lifts 21.0 kg of water per minute...Ch. 8 - (II) A ski area claims that its lifts can move...Ch. 8 - (II) A 75-kg skier grips a moving rope that is...Ch. 8 - (III) The position of a 280-g object is given (in...Ch. 8 - (III) A bicyclist coasts clown a 6.0 hill at a...Ch. 8 - Draw a potential energy diagram, U vs. x, and...Ch. 8 - (II) The spring of Problem 75 has a stiffness...Ch. 8 - (III) The potential energy of the two atoms in a...Ch. 8 - (III) The binding energy of a two-particle system...Ch. 8 - What is the average power output of an elevator...Ch. 8 - A projectile is fired at an upward angle of 48.0...Ch. 8 - Water flows over a clam at the rate of 580kg/s and...Ch. 8 - A bicyclist of mass 75 kg (including the bicycle)...Ch. 8 - A 62-kg skier starts from rest at the top of a ski...Ch. 8 - Repeat Problem 83, but now assume the ski jump...Ch. 8 - A ball is attached to a horizontal cord of length ...Ch. 8 - Show the h must be greater than 0.60 if the ball...Ch. 8 - Show that on a roller coaster with a circular...Ch. 8 - If you stand on a bathroom scale, the spring...Ch. 8 - A 65-kg hiker climbs to the top of a 4200-m-high...Ch. 8 - The small mass m sliding without friction along...Ch. 8 - A 56-kg student runs at 5.0 m/s, grabs a hanging...Ch. 8 - The nuclear force between two neutrons in a...Ch. 8 - A fire hose for use in urban areas must be able to...Ch. 8 - A 16-kg sled starts up a 28 incline with a speed...Ch. 8 - The Lunar Module could make a safe landing if its...Ch. 8 - Proper design of automobile braking systems must...Ch. 8 - Some electric power companies use water to store...Ch. 8 - Estimate the energy required from fuel to launch a...Ch. 8 - Prob. 99GPCh. 8 - Suppose the gravitational potential energy of an...Ch. 8 - (a) If the human body could convert a candy bar...Ch. 8 - Electric energy units are often expressed in the...Ch. 8 - Chris jumps off a bridge with a bungee cord (a...Ch. 8 - In a common test for cardiac function (the stress...Ch. 8 - (a) If a volcano spews a 450-kg rock vertically...Ch. 8 - A film of Jesse Owenss famous long jump (Fig. 849)...Ch. 8 - An elevator cable breaks when a 920-kg elevator is...Ch. 8 - A particle moves where its potential energy is...Ch. 8 - A particle of mass m moves under the influence of...Ch. 8 - Prob. 110GP
Additional Science Textbook Solutions
Find more solutions based on key concepts
The diagram shows Bob’s view of the passing of two identical spaceships. Anna’s and his own, where v=2 . The le...
Modern Physics
The pV-diagram of the Carnot cycle.
Sears And Zemansky's University Physics With Modern Physics
3. What is free-fall, and why does it make you weightless? Briefly describe why astronauts are weightless in th...
The Cosmic Perspective (8th Edition)
24.7 Skills for applying the wave model of light * EST A sound of frequency 1000 Hz passes a basketball. Estima...
College Physics
8. A 1000 kg car pushes a 2000 kg truck that has a dead battery. When the driver steps on the accelerator, the ...
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
The moons of Saturn may have large amounts of ammonia and methane ice, while those of Jupiter do not because (a...
Life in the Universe (4th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Repeat the preceding problem, but including a drag force due to air of fdrag=bv .arrow_forwardA space probe is fired as a projectile from the Earths surface with an initial speed of 2.00 104 m/s. What will its speed be when it is very far from the Earth? Ignore atmospheric friction and the rotation of the Earth. P11.26 Ki+Ui=Kf+Uf12mvi2+GMEm(1rf1ri)=12mvf212vi2+GME(01RE)=12vf2orvf2=v122GMEREandvf=(v122GMERE)1/2,vf=[(2.00104)21.25108]1/2m/s=1.66104m/sarrow_forward14–83. A rocket of mass m is fired vertically from the surface of the earth, i.e., atr = r. Assuming that no mass is lost as it travels upward, determine the work it must do against gravity to reach a distance n. The force of gravity is F = GM,m/² (Eq. 13–1), where M is the mass of the earth and r the distance between the rocket and the center of the earth.arrow_forward
- 6) Z. A thin non-condu cting rod of ma ss m and length L = 60cm, slides frictionl essly at a constant speed V = 0.5 m/s along the rails placed on the surface and at the edges of an inclined plane with the effect of an external force. The rails at the edges of the inclined plane are connected with each other via the rail at the bottom edge of the plane, so the rod and rails forms a rectangular closed loop as seen in the figure. The plane of the rails makes an angle 0 = 55° with the horizontal plane (xz plane). Before sliding, the rod stays at the di stan ce S = 4m measured from the bottom edge of the inclined plane. The inclined plane and the rod are under the effect of a uniform magnetic field given by B = 0.40î + 3ĵ + 0.8k(T). After the rod starts to slide, what will be the magnetic flux passing through the surface formed by the rod, the rails at the edges, and the rail at the bottom edge of the inclined plane at t=4s? A) 1.50 Wb B) 7.53 Wb C) 0.083 Wb D) 0.147 Wb E) 1.67 Wbarrow_forwardConsider a 0.5 kg mass at the top of a 1.5 m high (vertical) incline. if it is allowed to slide down with negligible friction, what will be its speed (in m/s) at the bottom?arrow_forwarda runaway truck with failed brakes is moving downgrade at 130 km/h just before the driver steers the truck up a frictionless emergency escape ramp with an inclination of u = 15.The truck’s mass is 1.2 = 104 kg. (a) What minimum length L must the ramp have if the truck is to stop (momentarily) along it? (Assume the truck is a particle, and justify that assumption.) Does the minimum length L increase, decrease, or remain the same if (b) the truck’s mass is decreased and (c) its speed is decreased?arrow_forward
- A system consists of three particles, each of mass 4.30 g, located at the corners of an equilateral triangle with sides of 31.0 cm. (a) Calculate the gravitational potential energy of the system. ] (b) Assume the particles are released simultaneously. Describe the subsequent motion of each. Will any collisions take place? Explain.arrow_forwardA bowling ball is dropped from a height h onto the centerof a trampoline, which launches the ball back up into the air.How high will the ball rise?(a) Significantly less than h.(b) More than h. The exact amount depends on the mass ofthe ball and the springiness of the trampoline.(c) No more than h—probably a little less.(d) Cannot tell without knowing the characteristics of thetrampoline.arrow_forward86. A 55-kg skier starts from rest at the top of a ski jump, point A in Fig. 6-48, and travels down the ramp. If fric- tion and air resistance can be neglected, (a) determine her speed vg when she reaches the horizontal end of the ramp at B. (b) Determine the distance s to where she strikes the ground at C. 45.0 m VB FIGURE 6-48 Problem 86. 30,0arrow_forward
- If the skier coasts up the hill, what is his speed (in m/s) when he reaches the top plateau? Assume friction between the snow and skis is negligible.arrow_forward8) A skier with a mass of 75 kg comes down a frictionless ski run that is circular (R= 30 m) at the bottom, as shown. If her speed is at the bottom of the hill (point B is 18.2 m/s, what is her speed at point A? 40° 30 marrow_forwardA 60 kg skier starts from rest at height H = 20 m above the end of a ski-jump ramp (Fig. 8-37) and leaves the ramp at angle 9=28°. Neglect the effects of air resistance and assume the ramp is frictionless. (a) What is the maximum heighth of his jump above the end of the ramp? (b) If he increased his weight by putting on a backpack, would h then be greater, less, or the same? H End of ramp Figure 8-37 Problem 22.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
University Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice University
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Classical Dynamics of Particles and SystemsPhysicsISBN:9780534408961Author:Stephen T. Thornton, Jerry B. MarionPublisher:Cengage Learning
University Physics Volume 1
Physics
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:OpenStax - Rice University
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
Physics for Scientists and Engineers, Technology ...
Physics
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Classical Dynamics of Particles and Systems
Physics
ISBN:9780534408961
Author:Stephen T. Thornton, Jerry B. Marion
Publisher:Cengage Learning
Gravitational Force (Physics Animation); Author: EarthPen;https://www.youtube.com/watch?v=pxp1Z91S5uQ;License: Standard YouTube License, CC-BY