Question

Please help me I need the answer before tomorrow and Please explain how you got your answer!!! While playing basketball in PE class, 67 kg Johan lost his balance after making a lay-up at 5.4 m/s and collided with the padded wall behind the basket and came to rest in 0.24 seconds. What force acted on his body?

A: -1300

B: -1500

C: -1700

D: -1900

Answer 1

Answer:

Option B

-1500 N

Explanation:

We know that force, F=ma where m is the mass of Johan and a is the acceleration

Since acceleration, $a=\frac {v-u}{t}$ where v and u are final and initial velocities, t is time taken. Considering that he comes to rest, v=0 and u is given as 5.4 m/s, t=0.24 s.

Therefore

$F=ma=m\frac {v-u}{t}=67\times \frac {0-5.4}{0.24}=-1507.5\approx -1500 N$