Question

A cricket ball of mass 0.25 kg with speed 10 ms$^{-1}$ collides with a bat and returns with same speed within 0.01 s. The force acted on bat is

• A. 25 N
• B. 50 N
• C. 250 N
• D. 500 N

Answer 1

Answer: (D)

500 N

Answer 2

We have the cricket ball having amass of 0.25 kg and moving with a speed of 10$ms^{-1}$, so the change in momentum would be equal to $\Delta p = 2mv = 2\times 0.25 \times 10 = 5kg-ms^{-1}$ and thus the force would be equal to F $\frac{\Delta p}{\Delta t}=\frac{5}{0.01}=500 N$