1. A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4m/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 thanthat 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'saverage 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 finalvelocity be? 1. Little Tammy lines up to tackle Jackson to (unsuccessfully) prove the law of conservation ofmomentum. Tammy's mass is 34.0 kg and Jackson's is 54.0 kg. Jackson is running at a velocity of3.0 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 ofyour 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 onice. The person catches the ball and immediately slides across the ice. Assume that momentumis conserved and there is no friction. Calculate the velocity of the person AND THE BALL.

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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?

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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Concept explainers

Distance and Speed

The speed, distance and time relation forms the basis of study of motion. You will need these concepts in the study of Mechanics. This concept is applicable for students who are studying the following courses –

Question

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.

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