4.11 know and use the relationship between work done, force and distance moved in the direction of the force: W = F × d
Work Done (J) = Force (N) x distance moved (m)
4.12 know that work done is equal to energy transferred
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Work done = energy transferred |
4.13 know and use the relationship between gravitational potential energy, mass, gravitational field strength and height: GPE = m × g × h
Gravitational potential energy (J) = Mass (kg) x gravitational field strength (N/kg) x height (m)
4.14 know and use the relationship: kinetic energy = 1/2×m×v^2
Kinetic energy (J) = 0.5 x mass (kg) x velocity (m/s) 2
4.15 understand how conservation of energy produces a link between gravitational potential energy, kinetic energy and work
Because energy is conserved the decrease in GPE = increase in KE, for a falling object if no energy is lost to the surroundings
4.16 describe power as the rate of transfer of energy or the rate of doing work
power is the rate of transfer of energy, or the rate of work done. so p = E/t
