Work, Energy, and Power MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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Which of the following is a non-renewable energy resource?
A. Solar energy
B. Wind energy
C. Natural gas
D. Hydroelectric energy
Answer: Natural gas
What is the gravitational potential energy of a 10 kg object at a height of 5 meters? (Take g = 9.8 m/s²)
A. 490 J
B. 100 J
C. 980 J
D. 50 J
Answer: 490 J
If a machine has an efficiency of 75% and the input work is 400 J, what is the output work?
A. 300 J
B. 200 J
C. 100 J
D. 50 J
Answer: 300 J
The work done on an object when it is moved from rest to a velocity of 10 m/s is:
A. 50 J
B. 100 J
C. 200 J
D. 300 J
Answer: 100 J
In which type of energy does a car’s engine convert chemical energy?
A. Mechanical energy
B. Kinetic energy
C. Thermal energy
D. Electrical energy
Answer: Mechanical energy
The work done to compress a spring is stored as:
A. Elastic potential energy
B. Kinetic energy
C. Thermal energy
D. Gravitational potential energy
Answer: Elastic potential energy
If a car accelerates from 20 m/s to 30 m/s, how does its kinetic energy change?
A. It increases by a factor of 2.25
B. It increases by a factor of 1.5
C. It doubles
D. It remains constant
Answer: It increases by a factor of 2.25
What is the mechanical advantage of a lever if the load force is 200 N and the effort force is 50 N?
A. 4
B. 2
C. 3
D. 5
Answer: 4
The energy stored in a stretched rubber band is an example of:
A. Elastic potential energy
B. Gravitational potential energy
C. Kinetic energy
D. Chemical energy
Answer: Elastic potential energy