# physics

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• Created by: Hayden.c.
• Created on: 29-06-20 09:21
• physics
• Untitled
• 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
• force = spring constant x extension

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