Homework Help: physics

Posted by Anonymous on Saturday, October 22, 2011 at 2:57pm.

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?

physics - Henry, Sunday, October 23, 2011 at 5:11pm
Fn = Fap - Ff,
Fn = 85cos30 - 52 = 21.6N = Net force.

Fn = ma,
a = Fn / m = 21.6 / 4.5 = 4.80m/s^2.

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