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Certain force acting on a 20 kg mass changes its velocity from

Science

Class 9

NCERT

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A battery lights a bulb. Describe the energy changes involved in the process.

Certain force acting on a

20 k g

mass changes its velocity from

5 m s^{- 1}

2 m s^{- 1}

. Calculate the work done by the force.

A mass of

10 k g

is at a point

A

on a table. It is moved to a point

B

. If the line joining

A

and

B

is horizontal what is the work done on the object by the gravitational force? Explain your answer.

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Question

Easy

Solving time: 3 mins

Certain force acting on a $20 k g$ mass changes its velocity from $5 m s^{- 1}$ to $2 m s^{- 1}$ . Calculate the work done by the force.

Views: 5,898 students

Updated on: Aug 30, 2023

Book:

Science (NCERT)

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Certain force acting on a

20 k g

mass changes its velocity from

5 m s^{- 1}

2 m s^{- 1}

. Calculate the work done by the force.

13 mins ago

Discuss this question LIVE

13 mins ago

Text solutionVerified

Given : Initial velocity

u = 5

m / s

Final velocity

v = 2

m / s

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

W = \frac{1}{2} m (v^{2} - u^{2})

W = \frac{1}{2} \times 20 \times (2^{2} - 5^{2})

⟹ W = - 210

J

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Practice more questions from Science (NCERT)

A battery lights a bulb. Describe the energy changes involved in the process.

Certain force acting on a

20 k g

mass changes its velocity from

5 m s^{- 1}

2 m s^{- 1}

. Calculate the work done by the force.

A mass of

10 k g

is at a point

A

on a table. It is moved to a point

B

. If the line joining

A

and

B

is horizontal what is the work done on the object by the gravitational force? Explain your answer.

View all

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Question Text	Certain force acting on a $20 k g$ mass changes its velocity from $5 m s^{- 1}$ to $2 m s^{- 1}$ . Calculate the work done by the force.
Updated On	Aug 30, 2023
Topic	Work and Energy
Subject	Science
Class	Class 9
Answer Type	Text solution:1 Video solution: 10
Upvotes	1104
Avg. Video Duration	3 min

Certain force acting on a $20 k g$ mass changes its velocity from $5 m s^{- 1}$ to $2 m s^{- 1}$ . Calculate the work done by the force.

Text solutionVerified

Filo tutor solutions (10)

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Certain force acting on a 20 kg mass changes its velocity from 5 ms−1 to 2 ms−1. Calculate the work done by the force.

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