Question

Two identical gliders slide toward each other on an air track. One moves at 2 m/s and the other at 1 m/s. If they stick together, the combination slides at ____________________.
A) 0.5 m/s.
B) 1 m/s.
C) 1.5 m/s
D) 2 m/s
E) 2.5 m/s.

Answer 1

m*2 - m*1 = 1 m
2 m (v) = 1 m
v = 1/2