A cart traveling at 0.3 m/s collides with stationary object. After the collision

Question

A cart traveling at 0.3 m/s collides with stationary object. After the collision, the cart rebounds in the opposite direction. The same cart again traveling at 0.3 m/s collides with a different stationary object. This time the cart is at rest after the collision. In which collision is the impulse on the cart greater?

A. The impulses are the same.

B. The second collision.

C. The first collision.

D. Cannot be determined without knowing the mass of the cart.

E. Cannot be determined without knowing the rebound speed of the first collision.

Explanation / Answer

A cart travelling at 0.3 m/s collides with a stationary object After the collision the cart rebounds in the opposite direction Impulse in first collision is I = p                                             = m v - ( mu )                                             = 2 m u cart again collides with a different stationary object with a speed 0.3 m/s Impulse in the second collision is I = mu so answer is option C In first collision impulse is greater

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