a. b. A motorcycle accelerates from 0-60 mph (26.8 m/s) in 2.4s. The mass of motorcycle and rider together is 270kg. What is the average power did this require during the acceleration run? Neglect all forms of friction. A machine gun fires 8.3 bullets in 2 seconds at a speed of 835 m/s. The mass of each bullet is 0.036 kg. What is the average recoil force experienced by the machine gun?

a. b. A motorcycle accelerates from 0-60 mph (26.8 m/s) in 2.4s. The mass of motorcycle and rider together is 270kg. What is the average power did this require during the acceleration run? Neglect all forms of friction. A machine gun fires 8.3 bullets in 2 seconds at a speed of 835 m/s. The mass of each bullet is 0.036 kg. What is the average recoil force experienced by the machine gun?

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter9: Linear Momentum And Collisions

Section: Chapter Questions

Problem 92AP: A car crashes into a large tree that does not move. The car goes from 30 m/s to 0 in 1.3 m. (a) What...

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A car crashes into a large tree that does not move. The car goes from 30 m/s to 0 in 1.3 m. (a) What impulse is applied to the driver by the seatbelt, assuming he follows the same motion as the car? (b) What is the average force applied to the driver by the seatbelt?
A pitcher claims he can throw a 0.145-kg baseball with as much momentum as a 3.00-kg bullet moving with a speed of 1.50 103 m/s (a) What must the baseballs speed be if the pitchers claim is valid? (b) Which has greater kinetic energy, the ball or the bullet?
Two blocks of masses m and 3m are placed on a frictionless, horizontal surface. A light spring is attached to the more massive block, and the blocks are pushed together with the spring between them (Fig. P8.7). A cord initially holding the blocks together is burned; after that happens, the block of mass 3m moves to the right with a speed of 2.00 m/s. (a) What is the velocity of the block of mass m? (b) Find the systems original elastic potential energy, taking m = 0.350 kg. (c) Is the original energy in the spring or in the cord? (d) Explain your answer to part (c). (e) Is the momentum of the system conserved in the bursting-apart process? Explain how that is possible considering (f) there are large forces acting and (g) there is no motion beforehand and plenty of motion afterward? Figure P8.7
A 2000 kg car is being pushed from rest by a bulldozer. The car is pushed for 10 seconds along a rough road with a coefficient of friction of 0.05. The car experiences an impulse of 10,000 kgm/s. a. What net force acts on the car? 1 of Z b. What is the acceleration of the car? C. What is the work done by the non-conservative forces as the car moves along the road? 1:05 P Ş/12/20 acer
A soccer ball with a mass of 450 g bounces off the crossbar of a goal and is deflected upward at an angle of 60° with respect to horizontal. Immediately after the deflection, the kinetic energy of the ball is 50 J. What are the vertical and horizontal components of the ball’s momentum immediately after striking the crossbar? a. 12.91 m/s &7.45 m/s c. 12.91 m/s & 7.45 m/s b. 12.91 m/s & 7.45 m/s d. 12.91 m/s & 7.45 m/s
Maria has a mass of 47.0 kg is resting on a frictionless horizontal surface. She is hit by a 270g volleyball with a speed of 50.0 km/h to the right. Assuming the collision is elastic, what is the kinetic energy of the system before the collision? What is the speed of the volleyball after collision?
A 2408kg car moving east at 12.3m/s collides with a 3391kg car moving east. The cars stick together and move east with a velocity of 7.56m/s. a. Find the velocity of the heavier car before the collision. b. How much kinetic energy will be lost in the collision?
A 777.86 g rubber ball is dropped from a height of 20.5m and undergoes a perfectly elastic collision with the earth. a.) What is the earth's speed after the collision? Assume the earth was at rest before the collision. b.) How many years would it take the earth to move 1 mm at this speed?
The ballistic pendulum is a device to measure the speed of a bullet using conservation of energy and momentum. A 20 g bullet is fired horizontally into a 1.1 kg wood block hanging from a 1.2-m-long string. The bullet embeds itself into the block, and the block then swings out to an angle of 35°. A. How high does the block of wood go relative to its initial height when its hanging straight down? B. What is the increase in gravitational potential energy of the wood block at its maximum height? C. Use conservation of energy to determine the speed of the block just after the bullet strikes it. D. Use conservation of momentum to determine the speed of the bullet right before it strikes the block.
A golf ball of mass 50 grams is struck and has a velocity of 70 m/s when it leaves the tee. The golf ball then hits a fence and comes to a stop in 0.02 seconds. 1. What is the kinetic energy of the ball as it comes off the tee? 2.What is the momentum of the ball as it comes off the tee? 3.What is the stopping force acting on the ball?
A 0.12.kg bullet moving 215.m/s hits a 6.7 kg block of wood at rest. If the bullet becomes embedded in the wood (and if the block of wood is free to move), what is the speed of the system immediately after the impact? What percent of the kinetic energy is lost due to the impact? Speed: 4.604.m/s 4.139_m/s С. D. 4.444.m/s 4.007 m/s 3.783_m/s А. В. Е. 4.285_m/s F. /--/ Percent: 114.60 percent 98.24 percent 111.20 percent 101.70 percent 94.82 percent 106.30 percent А. D. В. Е. С. F.
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