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Work_ Energy_ and Power MCQs for Competitive Exams

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Work_ Energy_ and Power MCQs for Competitive Exams

Practice with answers, explanations, and exam-focused revision notes.

406 MCQs Page 6

Topic Notes: Work_ Energy_ and Power

These notes summarize the key preparation context before you attempt the MCQs. Review the topic focus, then practice the questions below with answers and explanations.

Quick Overview

Work_ Energy_ and Power MCQs in Physics are useful for candidates who need targeted practice for CSS, PMS, FPSC, PPSC, NTS, entry tests, and other competitive exams in Pakistan. This topic page is designed for quick revision, repeated practice, and exam-focused preparation.

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51
A 0.2 kg ball is thrown vertically upward by a force applied over a distance of 0.2 meters. If the ball reaches a maximum height of 2 meters, what is the magnitude of the applied force? (Assume g = 10 m/s^2).
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52
Which device is defined as a machine that converts the kinetic energy of a fluid into rotational mechanical energy using blades?
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53
What is the equivalent value of one mechanical horsepower in watts?
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54
What form of energy is primarily associated with an object in motion?
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55
If the velocity of an object is doubled, how do its momentum and kinetic energy change?
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56
Calculate the kinetic energy of an object with a mass of 10 kg moving at a velocity of 2 m/s.
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57
A household consumes 320 units of electrical energy in one month. What is this energy equivalent to in joules?
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58
Determine the gravitational potential energy of a 10 kg mass located at a height of 6 meters above the ground, using g = 9.8 m/s².
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59
A pump lifts 200 kg of water to a height of 6 meters in 10 seconds. Calculate the power output of the pump (assume g = 10 m/s²).
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60
Which of the following is a necessary condition for mechanical work to be considered performed?
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