Physic question on force! revision help!?

Question

A force of 3N acting on the left and the force of 3N acting on the right. Is this consider moving at a constant speed which is 0 N or it is just 0N. What is a different between 0N and constant?

Answer 1

The mere fact that the net force acting on the body is zero means that the body is not moving. And, when it is not moving, then its speed is zero, as well.

Constant speed implies that the body is moving at a rate that is not changing. The key word here is "moving" ... if it is not moving, then its speed is zero.

Answer 2

Newtons are units of force, not speed. A force of 0 N indicates no dominant force. In other words, the net force is zero. Due to that, the object will move no where. A constant force is one that does not change.

Answer 3

Newtons first law states:"A particle will stay at rest or continue at a constant velocity unless acted upon by an external unbalanced force".

So even though the resultant force on the object is zero the object can stil be moving at a constant speed.This could be that theobject was already in motion(at constant speed) and then these 2 forces were applied which makes no difference to the system.It's just that it will not be accelerating....

F = ma

If F = 0 then a = 0...

Hope this helps