Laws Of Motion Question 282

Question: A player stops a football weighting 0.5 kg which comes flying towards him with a velocity of 10m/ s. If the impact lasts for 1/50th sec. and the ball bounces back with a velocity of 15 m/s, then the average force involved is

Options:

A) 250 N

B) 1250 N

C) 500 N

D) 625 N

Show Answer

Answer:

Correct Answer: D

Solution:

[d] $ \text{Here }m=0.5kg;\text{ }u=-10m/s;$

$ [t\text{ }=\text{ }1/50s;v=+15m{{s}^{-1}}] \text{Force}=m(v-u)/t=0.5(10+15)\times 50\text{ }=625N $



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