An intrepid bicyclist winds her way down from the top of Sandia Mountain to Albu

Question

An intrepid bicyclist winds her way down from the top of Sandia Mountain to Albuquerque. Which statement is correct about the work done on her by the normal force and the force of gravity? O O O O The normal force and the force of gravity both do positive work. The normal force does zero work and the force of gravity does negative work. The normal force and the force of gravity both do negative work. The normal force does zero work and the force of gravity does positive work. The normal force and the force of gravity both do zero work.

Explanation / Answer

Due inclination of road , the angle between normal force and direction of motion will be 90 degree so work done by normal force will be zero .

And work done by gravity force will be positive due (mgsinthetha is applied force ) in the direction of motion .

Hence statement, the normal force does zero work and the force of gravity does positive work.

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