Chapter 6, Problem 76AP

### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

Chapter
Section

### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

# Two blocks collide on a frictionless surface. After the collision, the blocks stick together. Block A has a mass M and is initially moving to the right at speed v. Block B has a mass 2M and is initially at rest. System C is composed of both blocks, (a) Draw a force diagram for each block at an instant during the collision, (b) Rank the magnitudes of the horizontal forces in your diagram. Explain your reasoning, (c) Calculate the change in momentum of block A, block B, and system C. (d) Is kinetic energy conserved in this collision? Explain your answer. (This problem is courtesy of Edward F. Redish. For more such problems, visit http://www.physics.umd.edu/perg.)

(a)

To determine

To draw: A force diagram for each block at an instant during the collision.

Explanation

Given info: The mass of the block A is M . Initially block A moves to the right with speed v . The mass of the block B is 2M and is initially at rest. System C is the combined system of A and B.

Explanation:

The force diagram of the block A and B is given below,

(b)

To determine
The rank of the magnitudes of the horizontal forces on the diagram.

(c)

To determine
The change in momentum of system C.

(d)

To determine
Whether the kinetic energy is conserved in the collision of the two blocks.

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