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 Answer: Option B
Explanation
K.E = (frac{1}{2}Mv^2 = frac{1}{2} times 2 times 20^2 = 400J)