A 46-kg rigid box is at rest on a horizontal floor. A 22-kg child sits on top of

Question

A 46-kg rigid box is at rest on a horizontal floor. A 22-kg child sits on top of the box. A person pushes horizontally on the box with a force of 90. N. The force of static friction between the box and the floor is 230 N. What is the magnitude of the net force on the box? A.) 0 N B.) 140 N C.) 670 N D.) 990 N A 46-kg rigid box is at rest on a horizontal floor. A 22-kg child sits on top of the box. A person pushes horizontally on the box with a force of 90. N. The force of static friction between the box and the floor is 230 N. What is the magnitude of the net force on the box? A.) 0 N B.) 140 N C.) 670 N D.) 990 N A.) 0 N B.) 140 N C.) 670 N D.) 990 N

Explanation / Answer

A) Net force on box is zero. Because the static frictional force is 230 N is greater than applied 90 N force. As static frictional force applies a force equal to 90N and the Net force on the box is nullified.

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