UPSC CDS/OTA
Work, Energy and Power
General Studies
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Work, Energy and Power

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Questions
30
Time
30 min
Marks
30
Solutions
All inline
Q1Which of the following is correct about work done by a force? 1. Work is a scalar quantity. 2. Work done can be positive, negative, or zero. 3. Work is maximum when force and displacement are perpendicular. Select the correct answer:MediumSolve →Q2A coolie carrying a load on his head and walking on a horizontal platform does no work against:MediumSolve →Q3Consider a spring compressed by a force F. The potential energy stored in the spring is proportional to:MediumSolve →Q4Select the correct statements: 1. Kinetic energy is frame-dependent. 2. Potential energy is absolute. 3. Total mechanical energy remains constant in conservative systems.MediumSolve →Q5A man lifts a box of mass 10 kg to a height of 2 m. Take g = 10 m/s². What is the work done by the man?MediumSolve →Q6A body of mass m moving with speed v has kinetic energy E. If its speed becomes 3v, its kinetic energy will be:MediumSolve →Q7Which of the following correctly distinguishes conservative and non-conservative forces? 1. Work done by conservative forces is path-independent. 2. Work done by non-conservative forces depends on the path. 3. Gravitational force is non-conservative.MediumSolve →Q8Q₈. The SI unit of power is:MediumSolve →Q9Which of the following forces is non-conservative?MediumSolve →Q10Select the correct statements: 1. A body moving in a circle at constant speed does work against centripetal force. 2. Power is a vector quantity. 3. The slope of the work-time graph gives power.MediumSolve →
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