0.0082N
0.0084N
0.082N
0.084N
Correct answer is B
F=mass×acceleration but accl=v−ut
∴
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
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