Question

((about as class 9th science book lesson 9))
Two billiard balls each of mass 0.05kg moving in opposite directions each with a speed of 6m/s collide and rebounds and the velocities of each ball after the cultision?​

Answer 1

9 meter per second this numerical answer

Answer 2

Answer:

Mass of each ball =0.05kg

Initial velocity of each ball =6m/s

Magnitude of the initial momentum of each ball, P

i

=mv

i

=0.05×6=0.3 kg m/s

After collision, the balls change their directions of motion without changing the magnitudes of their velocity.

Final momentum of first ball, P

1f

=−0.3 kg m/s

Final momentum of second ball, P

2f

=0.3 kg m/s

Impulse imparted to first ball = P

1f

−P

1i

=−0.3−0.3 kg m/s=−0.6 kg m/s

Impulse imparted to second ball = P

2f

−P

2i

=0.3−(−0.3)=0.6 kg m/s

The negative sign indicates that the impulses imparted to the balls are opposite in direction.