### Physics Problem Set#### Problem 3Two train cars are moving in the same direction down a track. The car in front has a mass of \(2400 \, \text{kg}\) and is moving at \(2.85 \, \frac{\text{m}}{\text{s}}\). The second car has a mass of \(3900 \, \text{kg}\) and is following at \(3.85 \, \frac{\text{m}}{\text{s}}\). When the cars collide, they latch together.**a. What type of collision is this?****b. How fast do they move after colliding?**#### Problem 4A \(0.110 \, \text{kg}\) tennis ball is approaching a tennis player at \(23 \, \frac{\text{m}}{\text{s}}\) when she hits the ball with her racket. She returns the ball with a velocity of \(26 \, \frac{\text{m}}{\text{s}}\) by applying a force of \(300 \, \text{N}\) to the ball.**a. What is the change in momentum for the ball?****b. How long are the ball and racket in contact with each other?**

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4. A 0.110 kg tennis ball is approaching a tennis player at 23 m when she hits the ball with her racket. She returns the ball with a velocity of 26 by applying a force of 300 N to the ball. 777 a. What is the change in momentum for the ball? b. How long are the ball and racket in contact with each other?

4. A 0.110 kg tennis ball is approaching a tennis player at 23 m when she hits the ball with her racket. She returns the ball with a velocity of 26 by applying a force of 300 N to the ball. 777 a. What is the change in momentum for the ball? b. How long are the ball and racket in contact with each other?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter8: Momentum And Collisions

Section: Chapter Questions

Problem 2CQ

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### Physics Problem Set

#### Problem 3

Two train cars are moving in the same direction down a track. The car in front has a mass of \(2400 \, \text{kg}\) and is moving at \(2.85 \, \frac{\text{m}}{\text{s}}\). The second car has a mass of \(3900 \, \text{kg}\) and is following at \(3.85 \, \frac{\text{m}}{\text{s}}\). When the cars collide, they latch together.

**a. What type of collision is this?**

**b. How fast do they move after colliding?**

#### Problem 4

A \(0.110 \, \text{kg}\) tennis ball is approaching a tennis player at \(23 \, \frac{\text{m}}{\text{s}}\) when she hits the ball with her racket. She returns the ball with a velocity of \(26 \, \frac{\text{m}}{\text{s}}\) by applying a force of \(300 \, \text{N}\) to the ball.

**a. What is the change in momentum for the ball?**

**b. How long are the ball and racket in contact with each other?**

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