A) zero
B) 5 m/s
C) 10 m/s
D) 20 m/s
Correct Answer: B
Solution :
From equation of motion, we have\[v=u+gt\]where v is final velocity, u the initial velocity, g the acceleration due to gravity and t the time. Taking downward direction negative \[u=10+5=15\text{ }m/s,\text{ }g=10\text{ }m/{{s}^{2}},\text{ }r=2s\] \[\therefore \] \[v=15-2\times 10=-5m/s\]You need to login to perform this action.
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