Question

800 m from the point where the person is standing, a navy ship is having target practice. The person finds that if a stone is dropped vertically at the same time as the spurt of smoke from the ship’s gun is seen, the stone hits the water at the same time as the sound from the gun is heard. Sound travels at 320 m / s in that region. Calculate the velocity with which the stone hits the water.

Answer 1

Answer:

25 m/s

Explanation:

time after which person hear sound

800/320 = 2.5 seconds

according to question stone hits the water at same time as sound is heard...

now velocity of stone is

. .. v = u + at

as stone is dropped it mean u = 0

now .... v = gt = 10 × 2.5 = 25 m/s

hope this will help you

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