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1) A 600-kg roller coaster car (includes passenger mass) is moving at 20.0 m/s. The hydraulic braking system in the track applies an external force to slow the car to a speed of 5.0 m/s over a distance of 20.0 meters. What is the force that acts upon the car?

1) A 600-kg roller coaster car (includes passenger mass) is moving at 20.0 m/s. The hydraulic braking system in the track applies an external force to slow the car to a speed of 5.0 m/s over a distance of 20.0 meters. What is the force that acts upon the car?

College Physics
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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Answer questions 1-3.
1) A 600-kg roller coaster car (includes passenger mass) is moving at 20.0 m/s. The hydraulic braking system in the track applies an external force to slow the car to a speed of 5.0 m/s over a distance of 20.0 meters. What is the force that acts upon the car? 2) A nerf gun (spring constant 36 N/m) compresses by 0.23 m to fire a 0.045 kg foam dart. If the dart is traveling at 6.1 m/s as it leaves the nerf gun, was energy conserved? Briefly, explain your thinking. 3) After falling 18 m, a 0.057 kg tennis ball has a speed of 12 m/s (the ball's initial speed is zero). Determine the average resistive force of the air in opposing the ball's motion.
Transcribed Image Text:1) A 600-kg roller coaster car (includes passenger mass) is moving at 20.0 m/s. The hydraulic braking system in the track applies an external force to slow the car to a speed of 5.0 m/s over a distance of 20.0 meters. What is the force that acts upon the car? 2) A nerf gun (spring constant 36 N/m) compresses by 0.23 m to fire a 0.045 kg foam dart. If the dart is traveling at 6.1 m/s as it leaves the nerf gun, was energy conserved? Briefly, explain your thinking. 3) After falling 18 m, a 0.057 kg tennis ball has a speed of 12 m/s (the ball's initial speed is zero). Determine the average resistive force of the air in opposing the ball's motion.
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