An object of mass 3 kg is at rest. If a force 
N is applied on the object, then the velocity of the object at t = 3 s is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Force applied on the object is rate of change of momentum.
According to Newton's 2nd law, force applied on an object is equal to rate of change of momentum.
That is 
or 
......(i)
Given m = 3 kg, t = 3s, 
N
Substituting these values in Eq. (i), we get
or 
Now, taking integration of both sides, we get
but t = 3s (given )
or 
or 
or 
or 
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