SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An object is 40 m high and has a mass of 40 kg. When it falls, what will be the velocity of the object right before it hits the ground (assuming no friction)? PE=KE, mgh=1/2mv^2
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20 m/s
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28 m/s
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13 m/s
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56 m/s
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Explanation:
Detailed explanation-1: -An object of mass 40 kg is pulled upto a height of 0.5 m. Calculate the work done. (given g = 9.8 m+s2) = 196 J.
Detailed explanation-2: -m = 2 kg, h = 40 m, and, g = 9.8 m/s². ⇒ U = 784 J.
There is 1 question to complete.