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What does a watt measure?
A. Power
B. Energy
C. Force
D. Work
Answer: Power
What is the formula for gravitational potential energy?
A. PE = mgh
B. PE = 1/2 mv^2
C. PE = F × d
D. PE = 1/2 kx^2
Answer: PE = mgh
The kinetic energy of an object is:
A. The energy of motion
B. The energy of position
C. The energy stored in a spring
D. The energy due to chemical reactions
Answer: The energy of motion
The principle stating that energy cannot be created or destroyed is known as:
A. Law of Conservation of Energy
B. Newton's First Law
C. Hooke's Law
D. Ohm's Law
Answer: Law of Conservation of Energy
The SI unit of work is:
A. Joule
B. Watt
C. Newton
D. Pascal
Answer: Joule
Which energy conversion occurs in a hydroelectric power plant?
A. Mechanical to electrical
B. Chemical to mechanical
C. Thermal to mechanical
D. Electrical to thermal
Answer: Mechanical to electrical
The work done in lifting an object is equal to the object’s:
A. Change in potential energy
B. Change in kinetic energy
C. Change in thermal energy
D. Change in chemical energy
Answer: Change in potential energy
The energy of a moving car is an example of:
A. Kinetic energy
B. Potential energy
C. Thermal energy
D. Chemical energy
Answer: Kinetic energy
The work-energy theorem states that the work done on an object is equal to:
A. The change in kinetic energy of the object
B. The force applied to the object
C. The distance moved by the object
D. The power used
Answer: The change in kinetic energy of the object