1. a Spring Whose Spring Constant Is 850 N/M Is Compressed 0.40 M by a Baseball. the Ball

Student:

Mr. Khalilian & Ms. Townsend

Physics, ______

Due Date:

1. A spring whose spring constant is 850 N/m is compressed 0.40 m by a baseball. The ball is then released.

a. Construct an energy bar graph of the situation. At Position A the baseball is compressed and Position B is the moment the ball has been released from the spring.

b. What is the maximum speed it can give to a .5 kg ball?

2. At position A a baseball (m = 0.140 kg) traveling at 30 m/s 2m above ground. At point B a fielder catches the ball at the same height.

a. Construct an energy bar graph of the situation, with the ball, and earth’s gravitational field as the system.

b. What did work on the system?

c. What happened to the total mechanical energy of the system? Why?

3. A bullet with a mass of 0.010 kilograms is fired from a rifle from a height of 1 m. At point A the bullet is at rest in the rifle and at point B the bullet is moving at a speed of 1500 m/s

a. Do an energy bar graph analysis of a system consisting of the bullet and earth. Position A represents the bullet before it is fired and Position B is the moment after it is fired

b. What did work on the system?

c. What happened to the total mechanical energy of the system? Why?

d. How much work was done to the system?

4. A 24 kg child descends a 5.0 m high slide and reaches the ground with a speed of 2.8 m/s.

a. Do a bar graph analysis for a system consisting of the boy and the earth for Position A (when the boy is at the top of the slide at rest) and position B (when the boy reaches the ground.)

b. How much work was done in the process?

Aim/Purpose of this assignment: To understand the use of energy. 2