An object of mass 10kg is dropped from a height of 100 cm. find:a) its kinetic energyb)velocity just as it reaches the ground (g=10m/s2)

An object of mass 10kg is dropped from a height of 100 cm. find:a) its

1.	An object of mass 10kg is dropped from a height of 100 cm. find:a) its kinetic energyb)velocity just as it reaches the ground (g=10m/s2)
Answer» *mass of the OBJECT ( m ) = 10 kg* *height (h) = 100cm = 1m* *g = 10m/s* $\frac{<klux>1</klux>}{2} mv^2$ *K.E.=* *when the body REACHES the ground its P.E. changes into K.E.* *object on the top = K.E.on the ground* *mgh = K.E.on the ground* $\frac{1}{2} v^2$ *gh=* $\sqrt{2gh}$ *v =* $\sqrt{2101}$ *v =* $\sqrt{20}$ *v = m/s* P.E = mgh = 10 * 10 * 1 = 20 j

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An object of mass 10kg is dropped from a height of 100 cm. find:a) its kinetic energyb)velocity just as it reaches the ground (g=10m/s2)

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