A 100 N child slides down a frictionless inclined plane as shown in the figure below. Which one of the following statements is true concerning the normal force that the plane exerts on the child?

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Answer:

Normal force may be less than weight, if there is some force with a component that acts opposite to the weight force. ... If the pulling force is horizontal, on a horizontal surface, then the normal force is equal to the weight. This is something your chould be able to see from a free-body diagram

Explanation: