Suppose you are helping a friend move. The friend asks you stand in the back of a pickup truck to hold a piano because there is
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Answer:
<u>Work done by the force acting on a body is defined as the product of force and displacement of the body in the direction of the force.</u><u> </u> It is a scalar quantity. Force acting on the body must produce a displacement for the work is to be done by the force. Thus, for the work to be done, the following conditions must be fulfilled:
A force must be applied and the applied force must produce a displacement in any direction except perpendicular to the direction of the force.
Mathematically,
( in the direction of force)
i.e W= F•D
The SI unit of force is Newton (N) and that of displacement of a metre (M). So the unit of work is Newton metre(Nm) which is joule (J).
Thus, one joule work is said to be done when one Newton force displaces a body through one metre in its own direction.
Hope this helps...
Good luck on your assignment..
The height of the light house is 17.86m.
To find the answer, we have to know about the simple pendulum.
<h3>How to find the height of the light house?</h3>- We have the expression for time period of the pendulum as,
where, g is acceleration due to gravity, and l is the length of the pendulum.
- For the pendulum with time period T kept at some height under the influence of gravity, then the height will be equal to,
Thus, we can conclude that, the height of the light house is 17.86m.
Learn more about the simple pendulum here:
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