A ball with an initial velocity of 12 m/s moves at an angle 56° above the +x-direction. The ball hits a vertical wall and bounces off so that it is moving 56° above the -x-direction with the same speed. What is the impulse delivered by the wall? (Assume the units of impulse are kg-m/s, and mass m is in kg. Enter your answer in terms of the mass of the ball, m. Do not include units in your answer.) Ap = X

A ball with an initial velocity of 12 m/s moves at an angle 56° above the +x-direction. The ball hits a vertical wall and bounces off so that it is moving 56° above the -x-direction with the same speed. What is the impulse delivered by the wall? (Assume the units of impulse are kg-m/s, and mass m is in kg. Enter your answer in terms of the mass of the ball, m. Do not include units in your answer.) Ap = X

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Far in space, where gravity is negligible, a 225 kg rocket traveling at 85 m/s fires its engines. (Figure 1) shows the thrust force as a function of time. The mass lost by the rocket during this 30 s is negligible. What impulse does the engine impart to the rocket? Express your answer in newton-seconds. At what time does the rocket reach its maximum speed? Express your answer with the appropriate units. What is the maximum speed of the rocket? Express your answer with the appropriate units.
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A golf ball of mass 0.045 kg is hit off the tee at a speed of 35 m/s. The golf club was in contact with the ball for 3.50×10−3 s. Part A Find the impulse imparted to the golf ball. Express your answer to two significant figures and include the appropriate units. F¯Δt =________ Part B Find the average force exerted on the ball by the golf club. Express your answer to two significant figures and include the appropriate units. F=____________
The forces shown in the force vs. time diagram in the figure below act on a 2.8-kg particle. F, (N) 4 t (s) 3 4 5 -2 (a) Find the impulse for the interval from t = 0 to t = 3.0 s. N:S (b) Find the impulse for the interval from t = 0 to t = 5.0 s. N:S (c) If the forces act on a 2.8-kg particle that is initially at rest, find the particle's speed at t = 3.0 s. m/s (d) If the forces act on a 2.8-kg particle that is initially at rest, find the particle's speed at t = 5.0 s. m/s 2.
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The main purpose of an air bag is to stop a passenger during a car accident in a greater amount of time than if the air bag were not present. For example, consider a 51 kg person traveling at 28 m/s (about 63 mph). Use impulse and momentum to calculate how many newtons of force would be required to stop the person in 0.035 s, 0.070 s, and 0.35 s. Note how the force changes with increased time. (Enter the magnitudes.) (a) How much force is needed to stop the person in 0.035 seconds? (b) How much force is needed to stop the person in 0.070 seconds? (c) How much force is needed to stop the person in 0.35 seconds?
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