physics
- Created by: Hayden.c.
- Created on: 29-06-20 09:21
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- physics
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- Physics
- contact and non-contact
- If two objects have to touch each other to feel a force the forces are called contact forces
- magnetism, static electricity and gravity
- examples include friction ,air, resistance, tension, thrust
- work done
- forces can change the length of an object like a spring
- force = spring constant x extension
- energy transferred equals work done
- gravity and centre of mass
- weight= mass x GFS
- weight=(N), mass=(kg), GFS=(N/kg)
- weight is measured in newtons and weight is measured using newtonmetre
- forces and elasticity
- forces=(N), spring constant=(N/m), extension=(m)
- this stops working when the forces is great enough
- when you apply a forces to an object you may cause it to stretch
- vectors and scalars
- vectors have magnitude and direction
- scalars: speed, distance, time, temperature
- vectors: forces, velocity, displacement, acceleration, momentum
- required practical - stretching a spring
- when a force moves an object through a distance, energy is transferred and work is done on the object.
- consider the horizontal and vertical directions separately
- state the size and direction of the resultant force
- contact and non-contact
- force = spring constant x extension
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