Most objects around you are acted on by more than one force. We can work out the effect of the forces on an object by replacing them with a single force, the resulting force. This is a single force that has the same effect as all the forces acting on the object.
When the resultant force on an object is zero, the object:
- remains stationary, or
- continues to move at the same speed it was already moving.
When the resultant force on object is not zero:
- the movement of the object depends on the size and direction of the resultant force.
When a jet plane is taking off, the thrust force of…