Question

a block of metal weighing 2 kg is resting water at a rate of 1 kg/s and a speed of 5m/s. the initial acceleration of the block will be​

Answer 1

Explanation:

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Answer 2

2.5 m/s²

Explanation:

=> The final velocity of mass of water after hitting the metal block is zero.

=> So the average change in momentum per second = initial momentum

=> mass x initial velocity of water

=> 1 kg x 5 m/s = 5 kgm/s

=> As this change in momentum occurs during 1 sec. We may say that the force exerted on the 2kg metal block is

=> F = change in momentum/time

=> 5 kgm/s / 1 s = 5 N

=> Hence by Newton's law initial acceleration of the block of mass m = 2 kg is given by

=> a = F/m = 5 N / 2 Kg

=> 2.5 m/s²