Physics · Work, Power & Energy
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Work is done by the applying force when
- A
Applied force is variable
- B
Applied force is perpendicular to the motion
- C
Applied force generated motion
- D
Applied force is constant
Work is equal to the product of force and displacement. So, work is only done by the applied force when this force produces motion.
Work can be done even if the applied force is variable. The key factor is that the force must cause a displacement in the direction of the force's component. The work done in such cases can be calculated by integrating the force over the distance traveled.
The applied force is perpendicular to the direction of motion, no work is done. Work is only done when there is a component of the applied force in the direction of motion. In this case, the work done is zero.
Work is done when an applied force causes an object to move in the direction of the force's component. If the applied force generates motion, work is being done on the object.
Work can be done by a constant applied force, but it is not the only condition. The force must also cause the object to move in the direction of the force's component for work to be done.
Tagged under Physics · Work, Power & Energy · 2021