Question

a 75 kg object traveling at 4 m/s collides with and sticks to a 125 kg object initially at rest, what is the final velocity of the two objects?

Answer 1

Answer:

1.5m/s

Explanation:

Given parameters:

M1  = 75kg

V1  = 4m/s

M2  = 125kg

V2  = 0m/s

Unknown:

Final velocity of the two objects  = ?

Solution:

To solve this problem, we must understand that this is an inelastic collision. To conserve momentum;

          M1 V1   + M2 V2  = V (M1 + M2)

       ( 75 x 4 )  +  ( 125 x 0)   = V (75 + 125)

                   300  = 200V

                     V  = 1.5m/s