Physics
A person can jump higher on the moon's surface than on the earth because :

The moon is cooler than earth
The acceleration due to gravity in moon is smaller than that on the earth.
The moon has no atmosphere
The moon's surface is rough

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Physics
A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that

The metal ball suffers greater change in momentum
The initial momentum of the rubber ball is greater than that of the metal ball
The rubber ball suffers greater change in momentum
Both suffer the same change in momentum

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