a) Kinetic and gravitational potential energy
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5 Terms
define kinetic energy
energy resulting from an object’s motion
state the formula for kinetic energy
Ek = ½mv2
kinetic energy of an object (J) = ½ × mass of the object (kg) × velocity of the object2 (ms-1)
define gravitational potential energy
energy resulting from an object’s position in a uniform gravitational field
state the formula for gravitational potential energy
Ep = mgΔh
gravitational potential energy of an object (J) = mass of the object (kg) × acceleration of free fall (ms-2) × change in height (m)
state the two formula’s applicable when kinetic and gravitational potential energy are exchanged
½mv2 = mgΔh
loss/gain in Ek = loss/gain in Ep
v = √2gh
velocity of the object (ms-1) = √ 2 × acceleration of free fall (ms-2) × change in height (m)
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