Practice Law Of Conservation Of Energy (2.6) - Work, Energy and Power

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9 questions

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6 sample questions

Question 1.
What is the Law of Conservation of Energy?
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Think about the energy you use every day.
Question 2.
Give an example of kinetic energy.
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What do you feel when you run?
3Question 3.
The Law of Conservation of Energy implies that energy can be:
- Created
- Transformed
- Both Created and Destroyed
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Think about energy in everyday life.
4Question 4.
True or False: An isolated system can exchange energy with its surroundings.
- True
- False
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Consider the meaning of isolation.
Question 5.
A 2 kg ball is dropped from a height of 10 meters. Calculate its potential energy before it falls and its kinetic energy just before it hits the ground.
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Use the potential energy formula and remember that conservation states it converts to kinetic.
Question 6.
In a frictionless environment, a roller coaster car of mass 500 kg starts from rest at a height of 50 m. What will be its speed at the bottom of the track?
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Think about energy conservation when potential becomes kinetic.

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