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A stone of mass 2 0kg is thrown vertically upwa... - WAEC Physics 2006 Question

A stone of mass 2.0kg is thrown vertically upward with a velocity of 20.0 ms-1, calculate the initial kinetic energy of the stone
A
200J
B
400J
C
800J
D
1600J
correct option: b

K.E = (\frac{1}{2}Mv^2 = \frac{1}{2} \times 2 \times 20^2 = 400J)

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