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physics paper 1

Energy stores thermal kinetic gravitational potential elastic potential chemical magnetic electrostatic nuclear
How can energy be transferred in a system into or away from the system through different objects in the system between different types of energy stores.
Work done work done is just another way of saying energy transferred
Kinetic energy equation Kinetic energy = mass x speed KE = 0.5 x mv2
What does the energy in a kinetic energy store depend on The objects mass and speed
A car of mass 2500kg is travelling at 20m/s. Calculate the energy in its kinetic energy store. Ek= 0.5 x 2500 x 20 ² = 500,000 J
Raised objects store energy in... Gravitational potential energy stores
The amount of energy in a g.p.e store depends on what? The objects mass, height and strength
Gravitational potential energy equation g.p.e = mass x height x gravitational field strength Ep= mgh
Elastic potential energy equation elastic potential energy = 1/2 x spring constant x extension squared
Power equation 1 Power = energy transferred / time
power equation 2 Power = work done / time
Created by: emilieoneil
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