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A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed Is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?

A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed Is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?

Physics for Scientists and Engineers: Foundations and Connections
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter10: Systems Of Particles And Conservation Of Momentum
Section: Chapter Questions
Problem 4PQ: A mother pushes her son in a stroller at a constant speed of 1.52 m/s. The boy tosses a 56.7-g...
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1. A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration? 2. A cyclist accelerates from 0 m/s to 8 m/s in 3 seconds. What is his acceleration ? Is this acceleration higher than that of a car which accelerates from 0 to 30 m/s in 8 seconds? 3. A car advertisement states that a certain car can accelerate from rest to 70 km/h in 7 seconds. Find the car's average acceleration. 4. A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. What is the lizard's average acceleration? 5. If a Ferrari. with an initial velocity of 10 m/s, accelerates at a rate of 50 m/s/s for 3 seconds, what will its final velocity be?
Transcribed Image Text:1. A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration? 2. A cyclist accelerates from 0 m/s to 8 m/s in 3 seconds. What is his acceleration ? Is this acceleration higher than that of a car which accelerates from 0 to 30 m/s in 8 seconds? 3. A car advertisement states that a certain car can accelerate from rest to 70 km/h in 7 seconds. Find the car's average acceleration. 4. A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. What is the lizard's average acceleration? 5. If a Ferrari. with an initial velocity of 10 m/s, accelerates at a rate of 50 m/s/s for 3 seconds, what will its final velocity be?
1. Little Tammy lines up to tackle Jackson to (unsuccessfully) prove the law of conservation of momentum. Tammy's mass is 34.0 kg and Jackson's is 54.0 kg. Jackson is running at a velocity of 3.0 m/s. What must Tammy's minimum velocity be in order to stop Jackson's forward momentum? 8. In a collision, a 25.0 kg mass moving at 3.0 m/s transfers all of its momentum to a 5.0 kg mass. What is the velocity of the 5.0 kg mass after the collision? 9. What is the momentum of a 35.0 kg cannonball fired from a cannon with a velocity of 500.0 m/s? 10. Your brother's mass is 55.0 kg, and he as a 2.0 kg skateboard. What is the combined momentum of your brother and his skateboard if they are going 8.50 m/s? BONUS: A 15.0 kg medicine ball is thrown at a velocity of 10.0 m/s to a 60.0 kg person who is a rest on ice. The person catches the ball and immediately slides across the ice. Assume that momentum is conserved and there is no friction. Calculate the velocity of the person AND THE BALL.
Transcribed Image Text:1. Little Tammy lines up to tackle Jackson to (unsuccessfully) prove the law of conservation of momentum. Tammy's mass is 34.0 kg and Jackson's is 54.0 kg. Jackson is running at a velocity of 3.0 m/s. What must Tammy's minimum velocity be in order to stop Jackson's forward momentum? 8. In a collision, a 25.0 kg mass moving at 3.0 m/s transfers all of its momentum to a 5.0 kg mass. What is the velocity of the 5.0 kg mass after the collision? 9. What is the momentum of a 35.0 kg cannonball fired from a cannon with a velocity of 500.0 m/s? 10. Your brother's mass is 55.0 kg, and he as a 2.0 kg skateboard. What is the combined momentum of your brother and his skateboard if they are going 8.50 m/s? BONUS: A 15.0 kg medicine ball is thrown at a velocity of 10.0 m/s to a 60.0 kg person who is a rest on ice. The person catches the ball and immediately slides across the ice. Assume that momentum is conserved and there is no friction. Calculate the velocity of the person AND THE BALL.
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