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Find the velocity of a body of mass 100 ...

Find the velocity of a body of mass 100 g having kinetic energy 20 J.

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The correct Answer is:
The velocity of the body is `2ms^(-1)`
`m=100g=0.1kg,E_(k)=20J`
`E_(k)=(1)/(2)mv^(2)`
`therefore 20J=(1)/(2)xx0.1xxv^(2) therefore v^(2)=4 therefore v=2ms^(-1)`
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