Question

Calculate the work done in changing the momentum of a body of mass 10kg from 40 SI

units to 20 SI units? ( Hint: here work done = kinetic energy)​

Answer 1

Answer:

Answer is 20J

Explanation:

∆p=40kgm/s-20kgm/s

=-20kgm/s

mv=20

10v=20

v=2

K.E.= 1/2×m×v²

= 1/2×10×2²

=5×4

=20J

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