Study Guide 10, Self Test 7
© Department of Physics, University of Guelph

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1. A box of mass 4.00 kg is pulled a distance of 3.00 m up a 30.0 incline by a force of 100 N applied parallel to the incline. The coefficient of kinetic friction is 0.100. How much work is done by the 100 N force in moving the box the 3.00 m distance?


All surfaces are frictionless. The blocks are initially at rest. The larger block is released and slides down to strike the smaller. They stick together when they collide. What will be their final speed?

3. A motor raises a 100 kg object 40.0 m in 30.0 s. Assume the motor is 100% efficient. What power does it develop?

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