Question

How large a force parallel to a 300 incline is needed to give a 5.0 kg an acceleration 0.20 m/s2 up the incline a) if friction is negligible? b) if the coefficient is 0.30?

Answer 1

a)

$F=m(a+g\sin30°)=26~N.$

b)

$F=m(a+g\sin30°+\mu g\cos30°)=39~N.$