Two 0.50-kg carts are pushed toward each other from starting positions at either

Question

Two 0.50-kg carts are pushed toward each other from starting positions at either end of a 6.0-m low-friction track. Each cart is pushed with a force of 3.8 N , and that force is exerted for a distance of 1.0 m.

Part A

What is the work done on the two-cart system?

Part B

What is the change in kinetic energy of the system?

Part C

What is the kinetic energy of the center of mass of the system?

Part A

What is the work done on the two-cart system?

Part B

What is the change in kinetic energy of the system?

Part C

What is the kinetic energy of the center of mass of the system?

Explanation / Answer

a) work done = 2 x (3.8 x 1) = 7.6 J

b) kinetic energy of system = work done = 7.6 J

c) as both equal mass move towards each other with equal velocities, so velocity of center of mass =0

=> kinetic energy of center of mass = 0 J

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