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A ball of 0.5 kg mass moving with a spee...

A ball of 0.5 kg mass moving with a speed of `10 m//s` rebounds after strinking normally a perfectly elastic wall . Find the change in momentum of the ball.

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Change in linear momentum ` = - m upsilon - m upsilon `
` = -2 m upsilon = - 2 xx 0.5 xx 10 = - 10 kg ms^(-1) ` .
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