Question

#12 You are pushing a sofa across the floor. You exert a force of 5N to the west. There is a frictional force exerted 2N to the east. What is the net force?

Answer 1

The net force is 3 N west.

Since you are exerting a force F west which is 5 N. So, F = -5 N(taking west direction as  negative).

Also, the frictional force, f which is 2 N is exerted east. So, f = + 2 N(taking east as positive)

The net force F' = F + f

= -5 N + 2 N

= - 3 N

So, the net force is 3 N west.

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