Question

A ball of mass 1 kg , moving in a straight line at a velocity u hits a stationary object of the mass of 5 kg and they stick together after a collision. If the combined velocity of the ball and the block is 1.6 m/s , then the value of u is _________.

0

1.6 m/s

7 m/s

10 m/s​

Answer 1

Answer:1.6m/s

Explanation:

By using

m1u1+m2+u2=m1v1+m2v2

1u + 5u = 1*1.6+5*1.6

6u= 1.6+8

u= 9.6/6u= 1.6 m/s

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