forces
- Created by: preeti1979
- Created on: 21-04-18 21:03
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- forces
- a force is a push or pull motion on any object
- they are all either non contact or contact
- when 2 objects interact there is always a force produced on both objects
- non-contact
- these are forces in which the objects do not need to be touching for forces to act
- e.g: magnetic forces, gravity,
- scalar quantities
- e.g.: distance, time, mass, temperature, speed
- can have magnitude or size but do not have any direction
- vector quantities
- e.g.: force, velocity, acceleration, displacement, momentum
- most physical quantities are vector
- vectors are shown in free body diagrams with the length of the arrows representing the size of the quantities
- free body diagrams
- if all in the free body diagrams are equal in length the object is either moving at a constant speed or is not moving
- the upwards facing arrow represents upthrust ; the south facing arrow represents weight ; the east facing arrow represents drag ; the west facing arrow represents thrust
- free body diagrams
- vector quantites are forces which can have magnitude or size and always have direction
- contact forces
- forces where the 2 objects need to be touching for the force to act
- e.g.: friction, air resistance, tension
- a force is a push or pull motion on any object
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