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A body of mass 28g, initially at rest is acted upon by a for...

A body of mass 28g, initially at rest is acted upon by a force, F Newtons. If it attains a velocity of 5.4ms1 in 18 seconds, find the value of F.

A.

0.0082N

B.

0.0084N

C.

0.082N

D.

0.084N

Correct answer is B

F=mass×acceleration but accl=vut

Mass = 28g = 0.028kg

v = 5.4 ms^{-1}; u = 0; t = 18secs

\therefore F = 0.028(\frac{5.4 - 0}{18}) = 0.028 \times 0.3 = 0.0084N