Question

Write the 2 conditions that must be met for work to be done.Give 2 examples of every situations where work is being done and 2 examples of situations where work is not being done. ​

Answer 1

Answer:

refer to the attachment

Explanation:

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Answer 2

Answer:

WORK IS ONLY DONE WHEN THE NET FORCE IS NOT ZERO AND THERE IS SOME DISPLACEMENT ( WORK= FORCE×DISPLACEMENT)

CONDITIONS:

1. THE NET FORCE SHOULD NOT BE ZERO.

2. THERE SHOULD BE SOME DISPLACEMENT.

EXAMPLE OF SITUATION WHERE WORK IS DONE:

1. THROWING A BALL

2. PUSHING A BOX

EXAMPLE OF SITUATION WHERE NO WORK IS DONE:

1. PUSHING A WALL BECAUSE THERE WILL BE NO DISPLACEMENT ( WORK = FORCE × DISPLACEMENT ; W= F×0 ; W=0)

2. CARRYING A BUCKET AT 90 DEGREE ANGLE.... HERE ALSO THE WORK WILL BE ZERO

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