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level: Energy

Questions and Answers List

Question	Answer
What does the law of the conservation of energy state?	Energy can't be created or destroyed buy changed from one form to another or transferred from one object to another.
What is the formula for work done?	Ew=Fd
In the formula Ew=Fd, what is Ew?	Work done when energy is transferred in Joules
In the formula Ew=Fd, what is F?	Force in Newtons
In the formula Ew=Fd, what is d?	distance in metres
what is gravitational potential energy?	work done when an object is lifted above the ground
what is the formula for gravitational potential energy?	Ep=mgh
In the formula Ep=mgh, what is Ep?	gravitational potential energy in Joules
In the formula Ep=mgh, what is m?	mass in kg
in the formula Ep=mgh, what is g?	gravitational field strength in Nkg-1
In the formula Ep=mgh, what is h?	height in metres
What is kinetic energy	the energy of an objects movement
what is the formula for kinetic energy?	Ek=½mv²
in the formula Ek=½mv², what is Ek?	kinetic energy in Joules
In the formula Ek=½mv², what is m?	mass in kg
in the formula Ek=½mv², what is v?	velocity in ms-1