Question

A constant force acts on a body mass 0.9 kg at rest for 10s.If the body moves a distance of 250m ,the magnitude of the force is

Answer 1

F = ma, so a = F/m

s = 1/2 at^2 = 1/2 (F/m) t^2
so,

1/2 (F/0.9)*10^2 = 250
F = 55.<u>5</u> N

Answer 2

Ooops. My bad. It should have been

55.<u>5</u>F = 250
F = 4.5N