A rollercoaster car has 2500 J of potential energy and 160 J of
1 answer:
Answer:
E_{k2}=2660 [J] kinetic energy.
Explanation:
The energy in the initial state i.e. when the rollercoaster is at the top is equal to the energy in the final state i.e. when it is at the bottom of the hill.
These states can be represented by means of the second equation.
Since the rollercoaster is located in the bottom of the hill where the potential energy level is zero, therefore there is only kinetic energy in the second state.
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In fact, light intensity is defined as the light power per unit of area:
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<span>but the power is the energy carried by the light per unit of time:
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