Question

A constant force acts on body of mass 0.9 kg at rest for 10 s, if the body moves a distance of 250 m the magnitude of force is_______(A)4.5 N (B)9.0 N (C)13.5 N (D)18 N

Answer 1

Answer:

f=ma

a = v×v/2×250

=625/500=5/4

9/10×5/4=45/40

=4. 5N

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