University Physics (14th Edition)
14th Edition
ISBN: 9780133969290
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
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Textbook Question
Chapter 4, Problem Q4.34DQ
If you squat down (such as when you examine the books on a bottom shelf) and then suddenly get up, you may temporarily feel light-headed. What do Newton’s laws of motion have to say about why this happens?
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A car is moving along a frictionless surface with a speed of 2 m/s to the left. You and your friend each come over and push the car at the same time. You exert a force of 6 N to the left, while your friend exerts a force of 6 N to the right.
According to Newton’s first law, how will this action affect the car’s motion?
The car will speed up because your force is in the same direction of the car’s motion, making it speed up.
The car will stop immediately because two balanced forces will cause an object to stop moving.
The car will continue to move 2 m/s to the left because there are balanced forces acting on it.
The car will continue moving to the left but at a slower speed because your friend’s force is going to make the car slow down.
A teacup fell was left on the wing of a fighter jet and did not fall until the jet was already very high up and very fast. After falling for some time it has reached a constant velocity of 55 m/s. The mass of the teacup is 237 g. What is the net force acting on the teacup?
John and Peter were pushing a 2000 kg car and it reached a speed of 3.0 m/s after starting from rest. It covered a distance of 10 meters. What is the amount of force (Newton) exerted by John and Peter if the coefficient of kinetic friction is 0.100 ?
Chapter 4 Solutions
University Physics (14th Edition)
Ch. 4 - Can a body be in equilibrium when only one force...Ch. 4 - A ball thrown straight up has zero velocity at its...Ch. 4 - A helium balloon hovers in midair, neither...Ch. 4 - When you fly in an airplane at night in smooth...Ch. 4 - If the two ends of a rope in equilibrium are...Ch. 4 - You tie a brick lo the end of a rope and whirl the...Ch. 4 - When a car stops suddenly, the passengers tend to...Ch. 4 - Some people say that the force of inertia (or...Ch. 4 - A passenger in a moving bus with no windows...Ch. 4 - Suppose you chose the fundamental physical...
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