You should create notes on the following:
  • Say how you can tell if the forces acting on an object are balanced or unbalanced
you can tell if it is balanced or unbalanced if the object is accelerating

Unbalanced forces can act on an object that is not moving. The object starts to move in the direction of the bigger force.
Unbalanced forces can act on a moving object. If the bigger force is in the same direction as the movement, then the object moves faster. If the bigger force is in the opposite direction to the movement, then the object moves slower.

  • How can you calculate the net force (overall force) acting on an object

An object pushing on another object will not accelerate if the support force can balance and match the pushing force. Where as if the support force cannot balance the two forces and it is weaker than the other object, than it will accelerate past the support force.

The mass of an object is measured in Newtons(N). The mass of an object is measured in Kilograms(Kg). When weighing in Newtons, you times the mass of and object by 10 to work out it's weight in kilograms on earth. e.g. if a person is 100 Newtons then their weight would be 10 (kg) on Earth.

When measuring balanced and unbalanced forces, the pushing force is measured in Newtons and so is the support force as we measure it by how much Newton weight it can balance. Say if a person weighing 50 kg is standing on a wooden board. The wooden board can hold 200 Newtons of weight. As stated before the weight on earth is timesed by 10 to get the weight in Newtons. So the person weighing 50 kg would weigh 500 Newtons. As the board can only balance a weight up to 200 Newtons than the person would accelerate past the board as it cannot support the persons weight.