M*g = 89.7kg * 9.8N/kg = 879.1 N. = Wt.
of box = Normal force(Fn).
Fs = u*Fn = 0.5 * 879.1 = 439.5 N. =
Force of static friction.
Fap-Fs = M*a
Fap-439.5 = M*0 = 0
Fap = 439.5 N. = Force applied.
While you are in detention after school, your teacher tells you to slide a large, 89.7 kilogram box across the floor. The coefficient of static friction (ìstatic) between the box and the floor is 0.50. Compute the force parallel to the ground (F parallel)required to start accelerating the box
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