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KCET2015PhysicsSemiconductors

The kinetic energy of a body of mass ( 4 ~kg ) and momentum ( 6 Ns ) will be

Options

  1. A( 2.5 ~J )
  2. B( 3.5 ~J )
  3. C( 4.5 ~J )
  4. D( 5.5 ~J )

Correct answer

C. ( 4.5 ~J )

Step-by-step solution

Given, mass, ( m=4 ~kg ; ) momentum, ( m v=6 ~N ~s ) Therefore, kinetic energy ( = 1 2 m v²= 1 2 (m v)² m = 6 6 2 4 = 36 8 =4.5 ~J ) Thus, kinetic energy of body ( =4.5 ~J )

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