How much work is needed to be done on a ball of mass 50g to give it a momentum of 5 kg m s-1? - Noon Academy

How much work is needed to be done on a ball of mass 50g to give it a momentum of 5 kg m s^-1?

Class 10 | ICSE | Physics | Selina | Work Energy

How much work is needed to be done on a ball of mass 50g to give it a momentum of 5 kg m s^-1?

Solutions:

According to the question –

Momentum is P = 500 gcm / s

P = 0.005 kgm / s

Mass of ball is 50 g

Or, m = 0.05 kg

Using the expression of kinetic energy, we have –

Kinetic energy of the ball = p² / 2m

= (0.005)² / 2 × 0.05 = 250J

i

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