Question

Block A has mass 1.00 kg and block B has mass 3.00 kg. The blocks collide and stick
together on a level, frictionless surface. After the collision, the kinetic energy (KE) of
block A is:
A. 1/9 the KE of block B
B. 1/3 the KE of block B.
C. 3 times the KE of block B.
D. 9 times the KE of block B.
E. the same as the KE of block B.

Answer 1

Are there no velocities?

Answer 2

u must consider initial and final velocities....... ur answer is C i guess!!