One joule of work is said to be done when:

  • A
    a force of $1 \, N$ displaces a body by $1 \, cm$
  • B
    a force of $1 \, N$ displaces a body by $1 \, m$
  • C
    a force of $1 \, \text{dyne}$ displaces a body by $1 \, m$
  • D
    a force of $1 \, \text{dyne}$ displaces a body by $1 \, \text{cm}$

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Similar Questions

Is it possible that a body be in accelerated motion under a force acting on the body,yet no work is being done by the force? Explain your answer giving a suitable example.

What is a watt?

$(a)$ How much work is done when a force of $1\, N$ moves a body through a distance of $1\, m$ in its direction?
$(b)$ Is it possible that a force is acting on a body but still the work done is zero? Explain giving one example.

An object of mass $10 \ kg$ is made to fall freely from a height of $10 \ m$. Complete the table:
Height of object $(m)$ $PE$ $(J)$ $KE$ $(J)$ Mechanical Energy $(J)$
$10$ ... ... ...
$8$ ... ... ...
$5$ ... ... ...
Just above ground ... ... ...

Hence,state the law of conservation of energy.

Justify giving proper reasoning whether the work done in the following case is positive or negative: Work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket.

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