A tennis ball of mass 0.11 kg travelling at 40 m per second hits a wall head on and bounces of returning along the same path at 30 M per second calculate the change in velocity of the ball as well as the change in momentum of that ball including the unit in your answer

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Solution

Mass=0.11kg
Initial velocity, u=+40m/s
Final velocity, v=-30m/s

Change in velocity=Final velocity- Initial velocity
=v-u
=-30 - 40
=-70m/s

Change in momentum=mv-mu
=m(v-u)
=0.11kg x (-70m/s)
=-7.7 kgm/s

The negative sign shows the direction, which is opposite to the initial velocity.

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A tennis ball of mass 0.11 kg travelling at 40 m per second hits a wall head on and bounces of returning along the same path at 30 M per second calculate the change in velocity of the ball as well as the change in momentum of that ball including the unit in your answer

Mass=0.11kg Initial velocity, u=+40m/s Final velocity, v=-30m/s Change in velocity=Final velocity- Initial velocity =v-u =-30 - 40 =-70m/s Change in momentum=mv-mu =m(v-u) =0.11kg x (-70m/s) =-7.7 kgm/s The negative sign shows the direction, which is opposite to the initial velocity.

Mass=0.11kg
Initial velocity, u=+40m/s
Final velocity, v=-30m/s

Change in velocity=Final velocity- Initial velocity
=v-u
=-30 - 40
=-70m/s

Change in momentum=mv-mu
=m(v-u)
=0.11kg x (-70m/s)
=-7.7 kgm/s

The negative sign shows the direction, which is opposite to the initial velocity.