Question

Two identically sized balls of unequal density (and thus mass) slide on the x-axis rightward, as shown above. Eventually, the faster moving 0.2kg ball collides (from behind) with the 0.1kg ball; immediately after the collision, the vertical component of the velocity of the 0.2kg ball is 0.25m/s upward. Identify the vertical component of the velocity of the 0.1 kg ball immediately after the collision.

A. Answer cannot be found without knowing how elastic the collision was.

B. 2m/s downward

C. 0.5m/s downward

D. 2m/s upward

E. 0.5m/s upward

Answer 1