Q.

If the increase in the kinetic energy of a body is 22%, then the increase in the momentum will be (in %)

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answer is 10.

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Detailed Solution

P=2mE.  If m is constant then P2P1=E2E1=1.22EE⇒P2P1=1.22=1.1⇒P2=1.1P1⇒P2=P1+0.1P1=P1+10% of  P1So the momentum will increase by 10%
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If the increase in the kinetic energy of a body is 22%, then the increase in the momentum will be (in %)