physics

posted by ree

1. A 100N block lies on a frictional surface. A force of 50N was applied horizontally where the block had moved 5 m from the positive direction. Find the work done by the applied force and the work done by the weight of the block.

2. Using Example 1, if the applied force is directed along the positive x direction. Find the work done by the applied force.


Problem Set #2

1. A block of mass 10 kg lying on a horizontal surface is pulled to the right by a force of 10N at an angle of 45° with the horizontal. The coefficient of sliding friction between block and surface is 0.1. Find the total work done on the block when it has moved a distance of 1m from its initial position.

2. Find the Kinetic Energy of a 1000 kg car moving at 25km/hr and when it is moving at 100 km/hr.

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