State the law of conservation of mechanical energy objective questions
Answers
Answer:
As the cars of a rollercoaster race down a hill, energy transformations take place. Which of the following is true?
1 Kinetic energy is stored in the cars as they move downhill. 2 The kinetic energy of the cars is equal to the potential energy of the cars.
3 Some energy is destroyed as the car slows down.
4 Some potential energy is transformed to kinetic energy and other forms of energy.
Question 2 of 10
What cannot happen to energy according to the law of conservation of energy?
1 Energy cannot be changed.
2 Energy cannot be created
3 Energy cannot be transformed.
4 Energy cannot be converted.
Question 3 of 10
Energy cannot be created or destroyed. Which statement about energy is correct?
1 A little energy is lost every time an energy transformation occurs.
2 Because of the conservation of energy, it is possible to have a machine that would never need energy.
3 Energy can change form, but energy can never change in total amount.
4 Conservation of energy occurs only when some of the energy is converted to light.
Question 4 of 10
The following equation illustrates the chemical reaction that occurs in a plant. Water + carbon dioxide + light energy to sugar + oxygen. Based on the law of conservation of energy, what happened to the light energy in the reaction?
1 It was destroyed.
2 It was converted into chemical energy stored in the sugar.
3 It was produced by the plant.
4 It was changed into oxygen gas.
Question 5 of 10
Friction is a force that opposes motion. When friction is present, heat is usually generated. According to the law of conservation of energy, which of the following statements is true about the energy associated with friction?
1 Energy is created with friction.
2 The law of conservation of energy does not apply.
3 Some of the energy is converted into thermal energy.
4 It was not transformed from another type of energy
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Explanation: