Work, Energy and Power are fundamental concepts in physics that describe how forces cause motion and how energy is transferred and used.
This chapter explains the relationship between force, displacement, energy and time, and forms the basis for understanding mechanical systems.
In physics, work is said to be done when a force applied on a body produces a displacement in the direction of the force.
Energy is defined as the capacity of a body to do work. Different forms of energy exist, such as kinetic energy and potential energy.
Power is the rate at which work is done or energy is transferred. It tells us how fast the work is performed.
Q1. Work, energy and power are related to: A) Force and motion B) Heat only C) Electricity only D) Magnetism only Answer: A Q2. Energy is defined as: A) Rate of doing work B) Ability to do work C) Force × distance D) Power × time Answer: B Q3. Power is defined as: A) Work done B) Energy stored C) Rate of doing work D) Force applied Answer: C Q4. Work is said to be done when: A) Force is applied but no displacement occurs B) Displacement occurs without force C) Force produces displacement D) Object is at rest Answer: C Q5. Which of the following is NOT covered under work, energy and power? A) Motion B) Force C) Time D) Electric current Answer: D
Work is done when a force applied on a body causes displacement in the direction of the force.
Energy is the capacity to do work.
Power is the rate of doing work or transferring energy.
Basic definition-based MCQs are asked from this topic.
