Work, Energy, and Power MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The energy possessed by a car moving at 10 m/s with a mass of 1200 kg is:
A. 60,000 J
B. 12,000 J
C. 6,000 J
D. 120,000 J
Answer: 60,000 J
The efficiency of a machine is a measure of how well it converts:
A. Input energy to useful work
B. Power to energy
C. Force to distance
D. Energy to power
Answer: Input energy to useful work
The energy transformation in a toaster is primarily from:
A. Electrical to thermal
B. Chemical to electrical
C. Mechanical to electrical
D. Electrical to mechanical
Answer: Electrical to thermal
Which of the following is not a type of potential energy?
A. Chemical potential energy
B. Elastic potential energy
C. Gravitational potential energy
D. Kinetic energy
Answer: Kinetic energy
The energy used to heat water in a kettle is primarily converted from:
A. Electrical to thermal
B. Thermal to electrical
C. Mechanical to electrical
D. Chemical to thermal
Answer: Electrical to thermal
The power of a machine that does 5000 J of work in 100 seconds is:
A. 50 W
B. 500 W
C. 5 W
D. 100 W
Answer: 50 W
The work done on an object is equal to the change in:
A. Energy of the object
B. Force applied
C. Distance moved
D. Power used
Answer: Energy of the object
The kinetic energy of an object with mass 2 kg and velocity 5 m/s is:
A. 25 J
B. 50 J
C. 10 J
D. 5 J
Answer: 25 J
The energy possessed by a moving object is:
A. Kinetic energy
B. Potential energy
C. Thermal energy
D. Chemical energy
Answer: Kinetic energy