posted by Anonymous on .
An object that has a mass of 36.0 kg is pushed along a horizontal surface with a force of 85.0 N at 30 degrees. If the force of friction is 52.0 N, what is the magnitude of the acceleration of the object?
Fn = Fap - Ff,
Fn = 85cos30 - 52 = 21.6N = Net force.
Fn = ma,
a = Fn / m = 21.6 / 4.5 = 4.80m/s^2.