Question

1-what is the amount of work done by a man in pressing a rigid wall with a force of 400N.
2-which one of the following is not the unit of energy.
I)-joule
ii)- newton meter
iii)- kilowatt
iv)- kilowatt hours
​

Answer 1

1) Work Done = Force×Displacement

= 400×0 = 0J

2) kilowatt is not the unit of energy, it is the unit of power

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