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WAEC Physics 2011 Paper
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© africaexams.com
Question : 9
Total: 49
A stone of mass 300g is released from rest from the top of a bulding of height 100m. Determine the kinetic energy gained by the stone when it is a quarter way down from the point of release.[g = 10 ms
-2
]
750.0J
225.0J
75.0J
22.5J
Validate
Solution:
K.E = P.E = mgh
= 0.3 x 10 x 100 - 0.3 x 10 x 75
= 75J
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