A force F acts on a body of mass 12kg increases its speed...
A force F acts on a body of mass 12kg increases its speed from 5 m/s to 35 m/s in 5 seconds. Find the value of F.
36 N
48 N
72 N
108 N
Correct answer is C
F=ma
a=v−ut
∴
F = 12(\frac{35 - 5}{5}) = 12 \times 6 = 72 N
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