Question

A block of metal weighing 4 kg is resting on a
frictionless plane. It is struck by a jet releasing
water at the rate of 2 kg/sec and at a speed ot
8 m/s. The initial acceleration of the block is :
1) 2 m/s2 (2) 4 m/s2 (3) 8 m/s2 (4) 1 m/s2​

Answer 1

Answer:

4 m/s^2

Explanation:

The force exerted by the jet in one second = m×a (where a is v/t)

= 2×8= 16N

For Block :

Ma'=16

4 × a'=16

a' = 4 m/s^2 (Answer)