EBK PHYSICS FOR SCIENTISTS & ENGINEERS
5th Edition
ISBN: 9780134296074
Author: GIANCOLI
Publisher: VST
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In April 1974, John Massis of Belgium managed to move two passenger railroad cars. He did so by clamping his teeth down on a bit that was attached to the cars with a rope and then leaning backward while pressing his feet against the railway ties.The cars together weighed 700 kN (about 80 tons). Assume that he pulled with a constant force that was 2.5 times his body weight, at an upward angle u of 30 from the horizontal. His mass was 80 kg, and he moved the cars by 1.0 m. Neglecting any retarding force from the wheel rotation, find the speed of the cars at the end of the pull.
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over the conveyor rollers and its tension to the left of A is
Fc= 400 N.
0.5 m/s
Fc = 400 N
Chapter 4 Solutions
EBK PHYSICS FOR SCIENTISTS & ENGINEERS
Ch. 4.4 - Suppose you watch a cup slide on the (smooth)...Ch. 4.5 - Prob. 1BECh. 4.5 - If you push on a heavy desk, does it always push...Ch. 4.5 - Return to the first Chapter-Opening Question, page...Ch. 4.7 - Prob. 1FECh. 4.7 - Prob. 1GECh. 4.7 - Prob. 1HECh. 4 - Why does a child in a wagon seem to fall backward...Ch. 4 - If an object is moving, is it possible for the net...Ch. 4 - If the acceleration of an object is zero, are no...
Ch. 4 - Only one force acts on an object. Can the object...Ch. 4 - When a golf ball is dropped to the pavement, it...Ch. 4 - If you walk along a log floating on a lake, why...Ch. 4 - (a) Why do you push down harder on the pedals of a...Ch. 4 - Prob. 9QCh. 4 - The force of gravity on a 2-kg rock is twice as...Ch. 4 - Prob. 11QCh. 4 - When an object falls freely under the influence of...Ch. 4 - Compare the effort (or force) needed to lift a...Ch. 4 - When you stand still on the ground, how large a...Ch. 4 - Whiplash sometimes results from an automobile...Ch. 4 - Mary exerts an upward force of 40N to hold a bag...Ch. 4 - A father and his young daughter are ice skating....Ch. 4 - Prob. 19QCh. 4 - Which of the following objects weighs about 1 N:...Ch. 4 - Why might your foot hurt if you kick a heavy desk...Ch. 4 - When you are running and want to slop quickly, you...Ch. 4 - Suppose that you are standing on a cardboard...Ch. 4 - Prob. 2MCQCh. 4 - Prob. 3MCQCh. 4 - Prob. 4MCQCh. 4 - Prob. 5MCQCh. 4 - Prob. 7MCQCh. 4 - Prob. 9MCQCh. 4 - Prob. 10MCQCh. 4 - Prob. 11MCQCh. 4 - Prob. 12MCQCh. 4 - Prob. 13MCQCh. 4 - Prob. 1PCh. 4 - Prob. 2PCh. 4 - Prob. 3PCh. 4 - Prob. 4PCh. 4 - Prob. 5PCh. 4 - Prob. 6PCh. 4 - (II) Superman must stop a 120-km/h train in 150 m...Ch. 4 - Prob. 8PCh. 4 - Prob. 9PCh. 4 - Prob. 10PCh. 4 - (II) A fisherman yanks a fish vertically out of...Ch. 4 - Prob. 12PCh. 4 - (II) A 20.0-kg box rests on a table. (a) What is...Ch. 4 - (II) A particular race car can cover a...Ch. 4 - Prob. 15PCh. 4 - Prob. 16PCh. 4 - Prob. 17PCh. 4 - (II) Can cars stop on a dime? Calculate the...Ch. 4 - Prob. 19PCh. 4 - (II) Using focused laser light, optical tweezers...Ch. 4 - Prob. 21PCh. 4 - Prob. 22PCh. 4 - Prob. 23PCh. 4 - (II) An exceptional standing jump would raise a...Ch. 4 - (II) High-speed elevators function under two...Ch. 4 - Prob. 26PCh. 4 - Prob. 27PCh. 4 - Prob. 28PCh. 4 - (I) Draw the free-body diagram for a basketball...Ch. 4 - (I) A 650-N force acts in a northwesterly...Ch. 4 - (I) Sketch the tree body diagram of a baseball (a)...Ch. 4 - Prob. 32PCh. 4 - Prob. 33PCh. 4 - Prob. 34PCh. 4 - (II) The cords accelerating the buckets in Problem...Ch. 4 - Prob. 36PCh. 4 - (II) A train locomotive is pulling two cars of the...Ch. 4 - Prob. 38PCh. 4 - (II) A skateboarder, with an initial speed of...Ch. 4 - (II) At the instant a race began, a 65-kg sprinter...Ch. 4 - (II) A mass m is at rest on a horizontal...Ch. 4 - Prob. 42PCh. 4 - (II) A 27-kg chandelier hangs from a ceiling on a...Ch. 4 - (II) Redo Example 413 but (a) set up the equations...Ch. 4 - (II) The block shown in Fig. 4-43 has mass m = 7.0...Ch. 4 - Prob. 46PCh. 4 - Prob. 47PCh. 4 - Prob. 48PCh. 4 - Prob. 49PCh. 4 - (II) As shown in Fig. 4-41, five balls (masses...Ch. 4 - A super high-speed 14-car Italian train has a mass...Ch. 4 - Prob. 52PCh. 4 - Prob. 53PCh. 4 - (II) A child on a sled reaches the bottom of a...Ch. 4 - Prob. 55PCh. 4 - Prob. 56PCh. 4 - (III) Determine a formula for the acceleration of...Ch. 4 - (III) Suppose the pulley in Fig. 446 is suspended...Ch. 4 - Prob. 59PCh. 4 - (II) Three blocks on a frictionless horizontal...Ch. 4 - Prob. 61PCh. 4 - (III) A small block of mass m rests on the sloping...Ch. 4 - (III) The double Atwood machine shown in Fig. 4-48...Ch. 4 - (III) Determine a formula for the magnitude of the...Ch. 4 - Prob. 65PCh. 4 - Prob. 66PCh. 4 - Prob. 67GPCh. 4 - Prob. 69GPCh. 4 - Prob. 70GPCh. 4 - Prob. 71GPCh. 4 - Prob. 72GPCh. 4 - Prob. 73GPCh. 4 - Prob. 74GPCh. 4 - Prob. 75GPCh. 4 - A block (mass mA) lying on a fixed frictionless...Ch. 4 - Prob. 77GPCh. 4 - Prob. 78GPCh. 4 - (a) What minimum force F is needed to lift the...Ch. 4 - Prob. 80GPCh. 4 - A jet aircraft is accelerating at 3.8m/s2 as it...Ch. 4 - Prob. 82GPCh. 4 - Prob. 83GPCh. 4 - A fisherman in a boat is using a 10-lb test...Ch. 4 - Prob. 85GPCh. 4 - Prob. 86GPCh. 4 - Prob. 87GPCh. 4 - Prob. 88GPCh. 4 - Prob. 90GPCh. 4 - Prob. 91GPCh. 4 - Prob. 92GPCh. 4 - Prob. 93GPCh. 4 - Prob. 94GP
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- (B) A maintenance man (climber) tries to maintain one of the power stations located at thetop of the mountain in the situation of winter. During his work and by mistake drops hiswater bottle which then slides 100 M down the side of a steep icy slope to a point which is10 m lower than the climber's position. The mass of the climber is 60 kg and his water bottlehas a mass of 500 g.1) If the bottle starts from rest, how fast is it travelling by the time it reaches the bottomof the slope? (Neglect friction.)What is the total change in the climber's potential energy as she climbs down the mountainto fetch her fallen water bottle? i.e. what is the difference between her potential energy atthe top of the slope and the bottom of the slope? Analysis all the above situation.arrow_forward(2) A parachutist is falling at a steady rate of 6 m/s. If the combined mass of the parachutist and the parachute is 90 kg, what is the resisting force exerted by air?arrow_forwardAbout 80 gram of blood is pumped from the heart during each heartbeat. The blood starts at rest and has a speed of 0.6 m/sec in the aorta. If the pumping takes 0.17 sec, what is the magnitude of the force on the blood?arrow_forward
- According to a simplified model of a mammalian heart, at each pulse approximately 20 gg of blood is accelerated from 0.22 m/sm/s to 0.36 m/sm/s during a period of 0.11 ss . What is the magnitude of the force exerted by the heart muscle?arrow_forwardAccording to a simplified model of a mammalian heart, at each pulse approximately 20 g of blood is accelerated from 0.25 m/s to 0.35 m/s during a period of 0.10 s. What is the magnitude of the force exerted by the heart muscle?arrow_forward6. A person steps horizontally off the roof of a single-story house that is 3.1 m high. When his feet hit the ground below, he bends his knees such that his torso decelerates over a distance of 0.65 m before coming to a stop. If the mass of his torso is 50 kg, what is the average net force exerted on his torso over this distance? [Ans 00 N& nssuming nositive v is in the unward direction]arrow_forward
- To make an object start moving on a surface with friction, will it usually require more, less or the same amount of force as to keep it moving on the same surface?arrow_forwardAn object of mass 1000 g falls from a height of 30m on the san below. If it penetrates 4cm into the sand, what opposing force is exerted on it by the sand? Neglect air friction. (f = 7350 N)arrow_forwardA person steps horizontally off the roof of a single-story house that is 3.1 m high. When his feet hit theground below, he bends his knees such that his torso decelerates over a distance of 0.65 m before coming to astop. If the mass of his torso is 50 kg, what is the average net force exerted on his torso over this distance?arrow_forward
- If a 2.3 kg object is initially at rest on a frictionless, horizontal surface and subjected to a 10.2 N force in the positive x-direction over a distance of 4.1 meters, what will the object’s final speed be? Assume the answer in in m/s.arrow_forward(III) A person jumps from the roof of a house 2.8 m high.When he strikes the ground below, he bends his knees sothat his torso decelerates over an approximate distance of0.70 m. If the mass of his torso (excluding legs) is 42 kg,find (a) his velocity just before his feet strike the ground,and (b) the average force exerted on his torso by his legsduring deceleration.arrow_forward15-6. A train consists of a 50-Mg engine and three cars, each having a mass of 30 Mg. If it takes 80 s for the train to increase its speed uniformly to 40 km/h, starting from rest, determine the force T developed at the coupling between the engine E and the first car A. The wheels of the engine provide a resultant frictional tractive force F which gives the train forward motion, whereas the car wheels roll freely. Also, determine F acting on the engine wheels.arrow_forward
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