Question

A metal ball of mass 1.5 kg moves with a velocity 12m/s. After 8 seconds it comes to rest. Calculate the change in momentum​

Answer 1

Answer:

nononononononononononononknknlno

Answer 2

Let their velocities after the collision be v

1

and v

2

. As we know for elastic collision.

Relative velocity of approach = relative velocity of separation

10−4=v

2

−v

1

⇒6=v

2

−v

1

⇒v

1

=v

2

−6

Applying conservation of momentum,

10×10+5×4=10v

1

+5v

2

120=10v

1

+5v

2

120=10(v

2

−6)+5v

2

=15v

2

−60

15v

2

=180⇒v

2

=12cm/sec

v

1

=6cm/sec