Quick Physics No. 2
A streamlined body falls into a liquid. The time (in seconds) of immersion of the body is?
Details and Assumptions
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Specific Gravity of object is 1.5, Specific Gravity of liquid = 9.0
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Height from which the object fell is 20 meters.
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Acceleration due to gravity is .
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Time of immersion means the time from hitting the surface of the liquid till coming to rest due to influence of buoyant force.
Solve, Reshare, Like and do remember to follow.
The answer is 0.4.
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I think there is a bit of ambiguity in this question. It is not 100 % clear if the answer expected is the time including the drop time before hitting the surface or just the time the body is in the liquid. I suppose we can infer that the time of immersion implies that time T= 0 is the instant the body enters the liquid. I think it would be more clear to state that in the assumptions.