Question

A tennis player hits a ball and gives it a change in momentum of 3.3 kg m/s over 5ms. What is the magnitude of the net force on the tennis ball?

Answer 1

Given:

A tennis player hits a ball and gives it a change in momentum of 3.3 kg m/s over 5ms.

To find:

Net force on the ball.

Calculation:

Force is defined as the instantaneous rate of change of momentum with respect to time.

$\rm{force = \dfrac{momentum \: change}{time} }$

$= > \rm{force = \dfrac{\Delta P }{time} }$

$= > \rm{force = \dfrac{3.3 }{5 \times {10}^{ - 3} } }$

$= > \rm{force = \dfrac{3.3 \times {10}^{3} }{5 } }$

$= > \rm{force = 0.66 \times {10}^{3} \: kgm{s}^{-2}}$

$= > \rm{force = 0.66 \times {10}^{3} \: N }$

So, final answer is:

$\boxed{ \bf{force = 0.66 \times {10}^{3} \: N }}$

Answer 2

Answer: 660N

Explanation: Did the work