Question

A 75-n sack is dragged along the floor with a horizontal force of 100 n. the frictional force acting on the sack is 30 n. what is the value of the fg?

Answer 1

75 N because the vertical components and vertical components are independent of each other. There is no vertical forces applied to the system except the normal force. The normal force is equal to the gravitational force because the object is not lifted of moved vertically