College Physics
OER 2016 Edition
ISBN: 9781947172173
Author: OpenStax
Publisher: OpenStax College
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Textbook Question
Chapter 5, Problem 15PE
Repeat Exercise 5.14 for a car with four-wheel drive.
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A car enters a banked turn of radius 8 m. The turn makes an angle of 22 degrees with the horizontal. The coefficient of static friction between the car's tires and the road is 0.5. Calculate the maximum speed the car can have without sliding over the top of the turn, in m/s.
(Please answer to the fourth decimal place - i.e 14.3225)
Your car rolls along a level street at 75 km/h to the right, in neutral and without braking. If the coefficient of
rolling friction is 0.01, how far will the car coast before stopping? Give your answer in meters.
See the attached sheet below for a starting hint.
An energetic father stands at the summit of a conical hill as he spins his 24 kg child around on a 5.5 kg cart with a 2.3-m-long rope. The sides of the hill are inclined at 22 ∘ to the horizontal. He keeps the rope parallel to the ground, and friction is negligible. What rope tension will allow the cart to spin with the 13 rpm?
Chapter 5 Solutions
College Physics
Ch. 5 - Define normal force. What is its relationship to...Ch. 5 - The glue on a piece of tape can exert forces. Can...Ch. 5 - When you learn to drive, you discover that you...Ch. 5 - When you push a piece of chalk across a...Ch. 5 - Athletes such as swimmers and bicyclists wear body...Ch. 5 - Two expressions were used for the drag force...Ch. 5 - As cars travel, oil and gasoline leaks onto the...Ch. 5 - Why can a squirrel jump from a tree branch to the...Ch. 5 - The elastic properties of the arteries are...Ch. 5 - What are you feeling when you feel your pulse?...
Ch. 5 - Examine different types of shoes, including sports...Ch. 5 - Would you expect your height to be different...Ch. 5 - Why can a squirrel from a tree branch to the...Ch. 5 - Explain why pregnant women often suffer from back...Ch. 5 - An old carpenter's trick to keep nails from...Ch. 5 - When a glass bottle full of vinegar warms up, both...Ch. 5 - A physics major is cooking breakfast when he...Ch. 5 - (a) When rebuilding her car's engine, a physics...Ch. 5 - (a) What is the maximum frictional force in the...Ch. 5 - Suppose you have a 120-kg wooden crate resting on...Ch. 5 - (a) If half of the weight of a small 1.00103 kg...Ch. 5 - A team of eight dogs pulls a sled with waxed wood...Ch. 5 - Consider the 65.0-kg ice skater being pushed by...Ch. 5 - Show that the acceleration of any object down a...Ch. 5 - Show that the acceleration of any object down an...Ch. 5 - Calculate the deceleration of a snow boarder going...Ch. 5 - (a) Calculate the acceleration of a skier heading...Ch. 5 - If an object is to rest on an incline without...Ch. 5 - Calculate the maximum deceleration of a car that...Ch. 5 - Calculate the maximum acceleration of a car that...Ch. 5 - Repeat Exercise 5.14 for a car with four-wheel...Ch. 5 - A freight train consists of two 8.00105 -kg...Ch. 5 - Consider the 52.0-kg mountain climber in Figure...Ch. 5 - A contestant in a winter sporting event pushes a...Ch. 5 - Repeat Exercise 5.18 with the contestant pulling...Ch. 5 - The terminal velocity of a person falling in air...Ch. 5 - A 60-kg and a go-kg skydiver jump from an airplane...Ch. 5 - A 560-g squirrel with a surface area of 930 cm2...Ch. 5 - To maintain a constant speed, the force provided...Ch. 5 - By what factor does the drag force on a car...Ch. 5 - Calculate the speed a spherical rain drop would...Ch. 5 - Using Stokes' law, verify that the units for...Ch. 5 - Find the terminal velocity of a spherical...Ch. 5 - Stokes' law describes sedimentation of particles...Ch. 5 - During a circus act, one performer swings upside...Ch. 5 - During a wrestling match, a 150 kg wrestler...Ch. 5 - (a) The "lead" in pencils is a graphite...Ch. 5 - TV broadcast antennas are the tallest artificial...Ch. 5 - (a) By how much does a 65.0-kg mountain climber...Ch. 5 - A 20.0-m tall hollow aluminum flagpole is...Ch. 5 - As an oil well is drilled, each new section of...Ch. 5 - Calculate the force a piano tuner applies to...Ch. 5 - A vertebra is subjected to a shearing force of 500...Ch. 5 - A disk between vertebrae in the spine is subjected...Ch. 5 - When using a pencil eraser, you exert a vertical...Ch. 5 - To consider the effect of wires hung on poles, we...Ch. 5 - A farmer making grape juice fills a glass bottle...Ch. 5 - (a) When water freezes, its volume increases by...Ch. 5 - This problem returns to the tightrope walker...Ch. 5 - The pole in Figure 5.24 is at a 90.0° bend in a...Ch. 5 - Prob. 1TPCh. 5 - Prob. 2TPCh. 5 - Prob. 3TPCh. 5 - Prob. 4TP
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- In addition to the remarkable top speed, cheetahs have impressive cornering abilities. In one study, the sideways force on the feet of a 50 kg cheetah, with its claws dug into the ground, was found to be 960 N. What was the radius of the turn if the cheetah was running at 20 m/s?arrow_forwardA car goes around a curve on a road that is banked at an angle of21.5°. Even though the road is slick, the car will stay on the roadwithout any friction between its tires and the road when its speedis 19.8 m>s. What is the radius of the curve?arrow_forwardA sledder of mass 54 kg enters a banked turn of radius 9 m. The turn is banked so that its slope is 15 degrees above the horizontal. Calculate the speed the sledder must have, in m/s, in order to navigate the turn without sliding up or down the slope of the turn. Assume that the slope is frictionless. (Please answer to the fourth decimal place - i.e 14.3225)arrow_forward
- a 650 kg car is taking a circular turn with a radius of 225 m that is banked with a 20 grade. If there is a coefficient of friction of 0.20 between the tires and the road, what use the maximum velocity the car can go without slipping up or down the turn?arrow_forward10 m/s, with 0.5 as the coefficient of static friction so that the car can still turn safely without skidding out of a curved road?arrow_forwardA car travels around a circle with a diameter of 500 m at a constant speed of 25 m/s. The static friction coefficient is 0.3 and the kinetic friction coefficient is 0.2. Will the car skid?arrow_forward
- An object of mass m swings in a horizontal circle on a string of length L that tilts downward at angle θ. Find an expression for the angular velocity ω in terms of g, L and angle θ. Furthermore, if a student ties a 350 g rock to a 1.8m long string and swings it around her head in a horizontal circle. At what angular speed, in rpm, does the string tilt down at a 10∘ angle? Lastly, do you know of any resources/ websites where I would be able to watch good detailed videos about circular motion problems/ to find practice problems (for circular motion in mechanics)? Thank you: )arrow_forwardA car moving at 41 km/h negotiates a 150 m -radius banked turn designed for 60 km/h . What coefficient of friction is needed to keep the car on the road? Express your answer using two significant figures.arrow_forwardA block of mass 1.96kg is accelerated across a rough surface by a rope passing over a pulley, as shown in the figure below. The tension in the rope is 14.0N, and the pulley is 10.8cm above the top of the block. The coefficient of kinetic friction is 0.350. Calculate the value of x at which the acceleration becomes zero.arrow_forward
- A 980-kg race car can drive around an unbanked turn at a maximum speed of 40 m/s without slipping. The turn has a radius of 160 m. Air flowing over the car's wing exerts a downward-pointing force (called the downforce) of 13000 N on the car. (a) What is the coefficient of static friction between the track and the car's tires? (b) What would be the maximum speed if no downforce acted on the car? (a) Number i (b) Number i Units Units #arrow_forwardPart of riding a bicycle involves leaning at the correct angle when making a turn, as seen in Figure 6.36. To be stable, the force exerted by the ground must be on a line going through the center of gravity. The force on the bicycle wheel can be resolved into two perpendicular components-friction parallel to the road (this must supply the centripetal force), and the vertical normal force (which must equal the system's weight). Find how the angle is related to the speed and radius of curvature of the turn in the same way as for an ideally banked roadway-Calculate the angle for a 12.0 m/s turn of radius 30.0 m (as in a race). N Angle = Free-body diagram W F F f CG W I F = sum of N and f N=warrow_forwardIf the length of the centrifuge arm is 13.0 m, at what speed is the rider moving when she experiences 10 g’s? Express your answer with the appropriate units.arrow_forward
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