A) 0.1, 55 kg m/s, 1550 N
B) 0.2, 45 kg m/s 1650 N
C) 0.3, 30 kg m/s, 1550 N
D) 0.4, 35 kg m/s, 1750 N
Correct Answer: D
Solution :
Impulse = change in momentum ... (i) Also, Impulse = force (F) \[\times \]time duration (At) ... (ii) \[\Delta p=m\Delta v=m\,(u-v)\] \[=1\,(25-(-10)=35\,kg-m/s\] \[\therefore \] Force \[=\frac{Impulse}{time\text{ }\left( \Delta t \right)}\] \[=\frac{35}{0.02}=1750\,N\]. Also, coefficient of restitution \[(e)=\frac{velocity\text{ }of\text{ }rebound}{velocity\text{ }of\text{ }fall}\] \[=\frac{10}{25}=0.4\]You need to login to perform this action.
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