1.) A bowling ball is rolling along a bowling lane. If it rolls at twice the speed, then its:A) Momentum is twice as large1)_B) Energy is four times as largeC) Both the above is trueD) None of the above are true2.) When a truck drives into a haystack, it doesn't get damaged. When it drives into a concrete wall, thereis a lot of damage. Both cases have the same initial speed for the truck and the same final speed aswell. What is the difference between these two cases?A) The initial momentum is less when it strikes the haystack.B) The impulse is less when striking the haystackC) The change in momentum is less when striking the haystackD) Force of impact is less when striking the haystack2)

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Description: 1.) A bowling ball is rolling along a bowling lane. If it rolls at twice the speed, then its:A) Momentum is twice as large1)_B) Energy is four times as largeC) Both the above is trueD) None of the above are true2.) When a truck drives into a haystac

We are given a bowling ball rolling at a certain speed. The objective is to find the energy and…

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1.) A bowling ball is rolling along a bowling lane. If it rolls at twice the speed, then its: A) Momentum is twice as large 1) B) Energy is four times as large C) Both the above is true D) None of the above are true

1.) A bowling ball is rolling along a bowling lane. If it rolls at twice the speed, then its: A) Momentum is twice as large 1) B) Energy is four times as large C) Both the above is true D) None of the above are true

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter11: Collisions

Section: Chapter Questions

Problem 23PQ: Ezra (m = 25.0 kg) has a tire swing and wants to swing as high as possible. He thinks that his best...

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Review. You can think of the workkinetic energy theorem as a second theory of motion, parallel to Newtons laws in describing how outside influences affect the motion of an object. In this problem, solve parts (a), (b), and (c) separately from parts (d) and (e) so you can compare the predictions of the two theories. A 15.0-g bullet is accelerated from rest to a speed of 780 m/s in a rifle barrel of length 72.0 cm. (a) Find the kinetic energy of the bullet as it leaves the barrel. (b) Use the workkinetic energy theorem to find the net work that is done on the bullet. (c) Use your result to part (b) to find the magnitude of the average net force that acted on the bullet while it was in the barrel. (d) Now model the bullet as a particle under constant acceleration. Find the constant acceleration of a bullet that starts from rest and gains a speed of 780 m/s over a distance of 72.0 cm. (e) Modeling the bullet as a particle under a net force, find the net force that acted on it during its acceleration. (f) What conclusion can you draw from comparing your results of parts (c) and (e)?
Bullet 2 has twice the mass of bullet 1. Both are fired so that they have the same speed. If the kinetic energy of bullet 1 is K, is the kinetic energy of bullet 2 (a) 0.25K, (b) 0.5K, (c) 0.71K. (d) K, or (e) 2K?
A 20-kg child is coasting at 3.3 m/s over flat ground in a 4.0-kg wagon. The child drops a 1.0-kg ball out the back of the wagon. What is the final speed of the child and wagon?
Review. In 1887 in Bridgeport, Connecticut, C. J. Belknap built the water slide shown in Figure P8.77. A rider on a small sled, of total mass 80.0 kg, pushed off to start at the top of the slide (point ) with a speed of 2.50 m/s. The chute was 9.76 m high at the top and 543 m long. Along its length, 72.5 small wheels made friction negligible. Upon leaving the chute horizon-tally at its bottom end (point ), the rider skimmed across the water of Long Island Sound for as much as 50 m, skipping along like a flat pebble, before at last coming to rest and swimming ashore, pulling his sled after him. (a) Find the speed of the sled and rider at point (b) Model the force of water friction as a constant retarding force acting on a particle. Find the magnitude of the friction force the water exerts on the sled. (c) Find the magnitude of the force the chute exerts on the sled at point (d) At point , the chute is horizontal but curving in the vertical plane. Assume its radius of curvature is 20.0 m. Find the force the chute exerts on the sled at point .
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Ezra (m = 25.0 kg) has a tire swing and wants to swing as high as possible. He thinks that his best option is to run as fast as he can and jump onto the tire at full speed. The tire has a mass of 10.0 kg and hangs 3.75 m straight down from a tree branch. Ezra stands back 10.0 m and accelerates to a speed of 3.50 m /s before jumping onto the tire swing. a. How fast are Ezra and the tire moving immediately after he jumps onto the swing? b. How high does the tire travel above its initial height?
Two children stand on a platform at the top of a curving slide next to a backyard swimming pool. At the same moment the smaller child hops off to jump straight down into the pool, the bigger child releases herself at the top of the frictionless slide. (i) Upon reaching the water, the kinetic energy of the smaller child com-pared with that of the larger child is (a) greater (b) less (c) equal. (ii) Upon reaching the water, the speed of the smaller child compared with that of the larger child is (a) greater (b) less (c) equal. (iii) During their motions from the platform to the water, the average acceleration of the smaller child compared with that of the larger child is (a) greater (b) less (c) equal.
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A block is connected to a spring that is suspended from the ceiling. Assuming air resistance is ignored, describe the energy transformations that occur within the system consisting of the block, the Earth, and the spring when the block is set into vertical motion.