Kinetic Energy and Work Energy Theorem
Kinetic Energy and Work Energy Theorem: Overview
Through this topic, we will understand the concept of kinetic energy in detail. We will derive the formula of kinetic energy here. It also discusses the statement of the work-energy theorem and explains how work depends on the change in kinetic energy.
Important Questions on Kinetic Energy and Work Energy Theorem
of work is done in sliding a block slowly up an inclined plane of height . Taking . Work done against friction is:
When we lift a body, we apply force. Don't you think that the body is gaining kinetic energy with height? Explain.
Chemical, gravitational and nuclear energies are nothing but potential energies for different types of forces in nature. Explain this statement clearly with examples.
A ball is dropped from the top of a building by a person. Another person observes the motion from the bottom. Will they agree on the value of ball's potential energy, and its change in potential energy?
Explain the energy transformation in a pole vault event.
"For one person, the kinetic energy of a body is zero whereas for another person it is not zero." Is it possible? Explain.
Can kinetic energy be negative? Explain.
Using the work-energy theorem, give an argument to show that the speed of an earth satellite moving at a constant altitude is constant.
Which conservation law is applicable to a body moving under non-conservative force?
State the law of conservation of mechanical energy.
What is the potential energy of a body in space?
What is the potential energy of a mass kept at the centre of the earth?
When can you say that a body has potential energy?
Define potential energy. Give examples.
Show that the sum of the change in kinetic energy and potential energy is zero when a particle moves under a conservative force.
Write down the relation connecting potential energy and force.
Define work and energy. How are they related?
Why do we prefer to use the work-energy concept to solve dynamics for a mechanical system instead of Newton's laws?
State and prove the law of conservation of energy.
Define kinetic energy and potential energy. Derive an expression for kinetic energy and potential energy.
