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Energy
work, power, kinetic and potential energy, efficiency
Question | Answer |
---|---|
what is the work formula? | force x distance |
what is the power formula? | power = work/time |
metric unit for horsepower | kilowatt |
formula for kinetic energy | E = 1/2mv^2 |
formula for gravitational potential energy | PE = mgh |
law of conservation of energy | total energy of a mechanical system is constant. energy can be transformed from one form to another but the total amount of energy is unchanged |
what is area under the force-distance graph when force is parallel to displacement of object | amount of work done |
formula for elastic potential energy | EP = 1/2kx^2 |
formula for law of conservation of mechanical energy | 1/2mv^2 + mgh = 1/2mv^2 + mgh |
what is an elastic collision | total kinetic energy is conserved |
what is an inelastic collision | total kinetic energy not conserved |
formula for velocity from mgh = 1/2mv^2 | v = square root of 2gh |