Question

A boy hits a 0.05-kg golf ball, giving it a speed of 75 m/sec. What impulse did he deliver to the ball? If the duration of impact is 0.01 seconds, what was the average force of impact?Group of answer choicesImpulse?Force?

Answer 1

Given:

The mass of the ball is m = 0.05 kg

The speed of the ball is

`v_f=75\text{ m/s}`

The initial speed of the ball is

`v_i=\text{ 0 m/s}`

The time duration is t = 0.01 s

Required: Impulse and average force

Step-by-step explanation:

The impulse can be calculated as

`\begin{gathered} Impulse\text{ = change in momentum} \\ =mv_f-mv_i \\ =(0.05*75)-(0.05*0) \\ =3.75\text{ N s} \end{gathered}`

The average force can be calculated as

`\begin{gathered} F_(av)=(Impulse)/(t) \\ =(3.75)/(0.01) \\ =\text{ 375 N} \end{gathered}`

Final Answer: The impulse of the golf ball is 3.75 N.s

The average force is 375 N