The two forces that act on falling objects –
- Gravity (weight) – direction, pulling objects downwards to the centre of the earth
- Air resistance (drag) – upwards force pushing objects upwards
- For acceleration to occur there must be unbalanced forces
Exam style answer – what is terminal velocity?
Drag forces (air resistance) have reached an increase to balance out the weight force. As a result of balanced forces, no more acceleration can occur, meaning it has reached terminal velocity.