Question

Average force exerted by the bat on the ball is
Let us consider another example. The given ball of mass $250g$ is dropped from a height $5m$ on a hard floor. Force exerted by the floor on the ball, as long as these are in contact, varies with time as shown in Fig.

• A. $5000N$
• B. $1250N$
• C. $2500N$
• D. $7500N$

Answer 1

The correct option is C $2500N$

Initial velocity of ball $=0$

Final velocity $=\sqrt{2gh}$

$=\sqrt{2\times 10\times 5}$

$=10m/s$

$\Rightarrow \frac{△v}{t}=\frac{10}{{10}^{-3}}m/s$

$={10}^{4}m/s$

$\Rightarrow m\frac{△v}{t}=.250\times {10}^{4}N$

$=2500N.$

Hence, the answer is $2500N.$