The decrease in potential energy of a ball of mass 20kg, which falls from a height of 50cm, is? a) 968J b) 98J c) 1980J d) 450J
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The decrease in potential energy of a ball of mass 20kg, which falls from a height of 50cm, is?
a) 968J
b) 98J
c) 1980J
d) 450J
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