Question

Which is having a higher value of momentum A bullet of mass 10 g moving with a velocity of 400 m/s or a cricket ball of mass 400 g thrown with the speed of 25m/s

Answer 1

Answer:

Explanation:

Momentum = mass(kg) x velocity(m/s).  Therefore find the momentum for each:

Bullet

velocity:    400m/s

mass:    10g = 0.01kg

momentum =  400m/s x  0.01  = 4 kgm/s

cricket ball:velocity:  90km/hr = 90000m/(60x60)s  = 25m/s

mass:  400g= 0.4kg

momentum= 0.4kg x 25m/s  = 10kgm/s

Therefore the cricket ball has a higher momentum of 10kgm/s as compared to that of the bullet of 4kgm/s

Answer 2

Answer:

A cricket ball.

Explanation:

We can put the momentum formula (momentum = mass x velocity) so momentum of a bullet= 10/1000 x 400 (since momentum is in kg m/s)

= momentum of bullet = 4 kg m/s

Momentum of a cricket ball= 400/1000 x 25

=momentum of a cricket ball= 10 kg m/s

Since, 4 kg m/s < 10 kg m/s

Momentum of ball is higher