Two blocks with different masses are attached to either end of a light rope that passes over a light, frictionless pulley suspended from the ceiling. The masses are released from rest, and the more massive one starts to descend. After this block has descended 1.20 m, its speed is 3.00 m/s.

Answer with Explanation:

We are given that

Speed,v=3 m/s

y=1.2 m

Total mass of two block=M==22 kg

We have to find the mass of each block.

According to law of conservation of energy

Where

Substitute the value

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.