Work, Energy, and Power MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The unit of work, the Joule, is equivalent to:
A. 1 N·m
B. 1 kg·m/s²
C. 1 W·s
D. 1 J/s
Answer: 1 N·m
What does the work-energy principle state?
A. The work done on an object equals the change in its energy
B. Energy can be created but not destroyed
C. Work done is independent of time
D. Energy is a measure of force applied
Answer: The work done on an object equals the change in its energy
If an object’s kinetic energy is 200 J and its potential energy is 300 J, what is its total mechanical energy?
A. 500 J
B. 200 J
C. 300 J
D. 100 J
Answer: 500 J
A cyclist exerts a force of 100 N to pedal a bicycle 500 meters in 20 seconds. What is the cyclist’s power output?
A. 5000 W
B. 2500 W
C. 250 W
D. 500 W
Answer: 2500 W
What type of energy is associated with the vibration of particles in a substance?
A. Thermal energy
B. Mechanical energy
C. Chemical energy
D. Electrical energy
Answer: Thermal energy
Which of the following is an example of potential energy?
A. A moving car
B. A compressed spring
C. A flowing river
D. A burning candle
Answer: A compressed spring
If an object’s kinetic energy is increased by 50 J, what has happened to the object’s velocity if the mass remains constant?
A. The velocity has increased
B. The velocity has decreased
C. The velocity remains unchanged
D. The velocity has doubled
Answer: The velocity has increased
How much work is done when a force of 30 N is applied at an angle of 30 degrees to the direction of motion over a distance of 10 meters?
A. 300 J
B. 259.8 J
C. 150 J
D. 173.2 J
Answer: 259.8 J
What happens to the kinetic energy of an object when its velocity doubles?
A. It doubles
B. It quadruples
C. It remains the same
D. It halves
Answer: It quadruples