Q&A - Ask Doubts and Get Answers
Q

Can someone explain A 3.000 kg ball is pitched with a kinetic energy of 20.00 Joules. Then the momentum of the ball is-2

A 3.000 kg ball is pitched with a kinetic energy of 20.00 Joules. Then the momentum of the ball is

  • Option 1)

    7.500 kg m/s.
     

  • Option 2)

    8.350 kg m/s.

  • Option 3)

    9.450 kg m/s.

  • Option 4)

    10.95 kg m/s.

 
Answers (1)
153 Views

As discussed in

Perfectly Elastic Collision -

Law of conservation of momentum and that of Kinetic Energy hold good.

- wherein

\frac{1}{2}m_{1}u_{1}^{2}+\frac{1}{2}m_{2}u_{2}^{2}= \frac{1}{2}m_{1}v_{1}^{2}+\frac{1}{2}m_{2}v_{2}^{2}

m_{1}u_{1}+m_{2}u_{2}=m_{1}v_{1}+m_{2}v_{2}

m_{1},m_{2}:masses

u_{1},v_{1}:initial \: and\: final \: velocity\: of \: the\: mass\ m_{1}

u_{2},v_{2}:initial \: and\: final \: velocity\: of \: the\: mass\ m_{2}

 

 P=\sqrt{2mk} = \sqrt{2\times 3\times 20}

P=\sqrt{120} = 10.95\:\: kg \:\:ms^{-1}


Option 1)

7.500 kg m/s.
 

This solution is incorrect.

Option 2)

8.350 kg m/s.

This solution is incorrect.

Option 3)

9.450 kg m/s.

This solution is incorrect.

Option 4)

10.95 kg m/s.

This solution is correct.

Exams
Articles
Questions