Lesson: The Work–Energy Principle for a Constant Force
In this lesson, we will learn how to use the work–energy principle to solve problems involving a moving particle under the action of a constant force.
Sample Question Videos
Worksheet: 25 Questions • 1 Video
A particle of mass 8 kg was left to descend along the line of greatest slope of a smooth plane inclined at to the horizontal. Using the work-energy principle, find the speed of the particle after it had moved a distance of 27 m down the slope, rounding your answer to two decimal places. Take .
A body of mass 300 g was placed 2 m up on a rough inclined plane. It slides down the plane from rest, reaching the ground with a speed of 156 m/min. Taking , find the work done by the body’s weight against friction.
A body of mass 550 g was placed at the top of an inclined plane of height 1.5 m. Find the velocity of the body when it reached the bottom of the plane given that the work done by the resistance of the plane against the motion was 1.59 joules. Take , rounding your answer to two decimal places.