A body of mass 5kg falls from a height of 10m a... - WAEC Physics 1992 Question
A body of mass 5kg falls from a height of 10m above the ground. What is the kinetic energy of the body just before it strikes the ground? (Neglect energy losses and take gas 10ms2)
A
5J
B
25J
C
250J
D
500J
correct option: d
v2 = u2 + 2gh = 0 + 2 x 10 x 10
v2 = 200; K.E = 1/2mv2 = 1/2 x 5 x 200 = 500J
v2 = 200; K.E = 1/2mv2 = 1/2 x 5 x 200 = 500J
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