Suppose the weight of a man on the planet A is half than that on the earth. If he can jump 0.4 m high on earth's surface, then how high he can jump on the planet A?

Answer

`0.8m`

Explanation

The gravitational potential energy of the man is same on the planet A and earth.
`therefore (mg_(1)h_(1))_("earth")=(mg_(2)h_(2))_("planet "A)`
`therefore (mg_(1))h_(1)=((mg_(1))/(2))h_(2)`
`therefore 2h_(1)=h_(2)`
`=2xx0.4m`
`therefore h_(2)=0.8m`