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9 Cards in this Set
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Work Done (J) 
Work Done (J)= Force(N) × Distance (Metres) 

Weight (N) 
Weight(N) = Mass (kg) ×Gravity (N/kg) 

Δ in an object's PE (Change inan object's gravitational potential energy) 
Δ in an object's PE= Weight (N) × Δ of height (m) 

Δ Gravitational Potential Energy (EP) 
ΔEP = Mass (kg) ×gravitational field strength × change of height (ΔH) 

Kinetic energy (J) 
Kinetic energy(J) = 1/2 mass (kg) ×speed squared (metres per second) 

Elastic potential energy, Ee (J) 
Ee (J) = 1/2 spring constant ×extension squared (Newtons per metre) (metres squared) 

Efficiency (%) 
Useful Output (J) / Total Input ×100 

Power (Watts) 
Energy (J)/ Time (seconds) 

Power wasted 
Power wasted= total power in useful power out 