A body moves a distance of 10 m along a straight line under the action of a force of 5 newton if the work done is 25 joules, the angle which the force takes with the direction of the motion of the body is:
Correct answer: C. 60 degree
- A. 0 degree
- B. 30 degree
- C. 60 degree
- D. 90 degree
Explanation
Work done (W) by a force acting on an object can be found by the formula:W= F.d.cosθW=25JF= 5Nd= 10mby putting values in the formula, we can find the value of θ which is 60 degrees.
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Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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