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An object of mass, m is moving with a constant velocity, v. Ho

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Class 9

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Illustrate the law of conservation of energy by discussing the energy changes which occur when we draw a pendulum bob to one side and allow it to oscillate. Why does the bob eventually come to rest? What happens to its energy eventually? Is it a violation of the law of conservation of energy?

An object of mass, m is moving with a constant velocity,

v

. How much work should be done on the object in order to bring the object to rest?

Calculate the work required to be done to stop a car of

1500 k g

moving at the velocity of

60 km / h

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An object of mass, m is moving with a constant velocity, $v$ . How much work should be done on the object in order to bring the object to rest?

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Updated on: Feb 26, 2023

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Science (NCERT)

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An object of mass, m is moving with a constant velocity,

v

. How much work should be done on the object in order to bring the object to rest?

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Text solutionVerified

Initial velocity of the object

= v

Final velocity of the object

= 0

The work done is equal to the change in the kinetic energy of an object.

W = \frac{1}{2} m [(0)^{2} - v^{2}]

⟹ W = - \frac{1}{2} m v^{2}

Here, work done is negative because it is acting on the mass.

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An object of mass, m is moving with a constant velocity,

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Question Text	An object of mass, m is moving with a constant velocity, $v$ . How much work should be done on the object in order to bring the object to rest?
Updated On	Feb 26, 2023
Topic	Work and Energy
Subject	Science
Class	Class 9
Answer Type	Text solution:1 Video solution: 7
Upvotes	673
Avg. Video Duration	3 min

An object of mass, m is moving with a constant velocity, $v$ . How much work should be done on the object in order to bring the object to rest?

Text solutionVerified

Filo tutor solutions (7)

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