Weight - The force of gravity on an object pulling it towards the ground., Reaction force - This occurs when two bodies are in contact with each other., Fricton - An opposing force which occurs when two objects move over each other., Air resistance - A force that acts in the opposite direction to the motion of a body travelling through the air., Balanced force - All forces are equal but oppose each other in terms of direction so the object remains at rest or in constant motion., Unbalanced force - The forces acting on an object are unequal so the object moves in the direction of the larger force., Scalar quantity - When measurements are described in terms of just their size or magnitude., Speed - = distance / time, Distance - = speed x time,

Vertical and horizontal forces

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