Q4 1 2 3

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Dear student 
 
a) According to Newtons' second law,

Force $\propto$ Rate of change of  momentum

Momentum p =  mv

Force $\propto$ dmv/ dt
Force $\propto$ m (dv/dt)
F= K ma
if K= 1
F= ma 
a = F/m 

If, F= 0
a= 0
Hence body will not move or move with a constant velocity. This is Newton's First law of motion which states that " every object in this universe will continue its state of rest or uniform motion unless acted upon by some external force".


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