Question

A boy and his skateboard have a combined mass of 65 kg. What is the speed of the boy and skateboard if they have a momentum of 275 kg • ? 0 m/s 0.24 m/s 4.2 m/s 8.5 m/s

Answer 1

1)  (mass of boy (m1) + Mass of Skate board (m2)) X Velocity = 275Kg-m/s

2) Massof Boy + Mass of skate board = (m1 + m2) = 65 Kg.

3) Thus Velocity of Boy & skate board = 275 / 65 = 4.2 m/s