#1
Which of the following best describes the law of conservation of energy?
Energy cannot be created or destroyed, only transformed from one form to another.
ExplanationEnergy is conserved and can only change forms.
#2
In a roller coaster ride, when the car moves to the top of a hill, its potential energy ________.
Increases
ExplanationPotential energy increases at higher elevations.
#3
Which of the following is an example of elastic potential energy?
A stretched rubber band
ExplanationElastic potential energy is stored in stretched objects.
#4
What is the unit of energy in the International System of Units (SI)?
Joule
ExplanationEnergy is measured in joules (J).
#5
Which of the following is not a type of potential energy?
Kinetic potential energy
ExplanationKinetic potential energy is not a recognized form.
#6
Which of the following is an example of kinetic energy?
A moving car
ExplanationKinetic energy is the energy of motion.
#7
A 5 kg object is moving with a velocity of 10 m/s. What is its kinetic energy?
100 J
ExplanationKinetic energy = 1/2 * mass * velocity^2
#8
Which of the following energy transformations occurs in a hydroelectric power plant?
Potential energy to kinetic energy
ExplanationWater's potential energy is converted to kinetic energy.
#9
In a swinging pendulum, where does the maximum potential energy occur?
At the highest point
ExplanationPotential energy is greatest at the highest point.
#10
Which of the following is a form of non-mechanical energy?
Thermal energy
ExplanationNon-mechanical energy is not related to motion or position.
#11
Which of the following situations violates the law of conservation of energy?
A car rolling to a stop due to friction
ExplanationEnergy is lost to friction, violating conservation.
#12
What happens to the total mechanical energy of a system if only non-conservative forces act on it?
Decreases
ExplanationNon-conservative forces can reduce mechanical energy.
#13
Which of the following statements is true regarding the law of conservation of energy?
It applies to all forms of energy and all systems.
ExplanationThe law applies universally to energy.
#14
Which of the following is an example of a conservative force?
Gravity
ExplanationConservative forces conserve mechanical energy.
#15
In an isolated system, what happens to the total mechanical energy over time?
It remains constant.
ExplanationMechanical energy is conserved in isolated systems.