Question

30 Joules work is done when a force f cause a displacement of 5 metre the magnitude of the force is
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Answer 1

Explanation:

You’ve got all the information you need, except for the relationship between force, displacement and work. That is, W=F.d or in your case, 30=5F

I really hope you can finish this calculation by yourself.

Answer 2

30 joules work is done, when a force 'F' causes a displacement of 5 m . The magnitude of force is :

Answer: 6 Newton