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  • Give example of a situation in which an applied force does not result in a change in kinetic energy.

Give example of a situation in which an applied force does not result in a change in kinetic energy.

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We are aware that work done = \overrightarrow{F}d\overrightarrow{s} = Fds \cos \theta

Now for the value of work done to be zero, \theta has to be equal to 90, since \cos 90 = 0

So, the direction between the force and the displacement needs to be at an angle of 90 degrees. Hence these situations can have work done to be zero. Some examples can be as follows:

i) A body moving in a horizontal direction in a uniform motion. Here, the work done due to gravity is totally zero.

ii) The case when a body is moving in a circular motion, the total work done is zero

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infoexpert24

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