# physics

posted by sam

suppose that a 70.0kg box is pulled by a 400.N force at an angle of 30 degrees to the horizontal. the coefficient of sliding friction is 0.500. what is the acceleration of the box?

1. bobpursley

the horizontal force is 400cos30
vertical force=400Sin30

net apparent weight=70g-400sin30

acceleration=nethorizonalforce/mass

= (400cos30-mu(70g-400sin30)/70

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