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Home/ Questions/Q 1348
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Taara Sharma
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Taara Sharma
Asked: October 28, 20202020-10-28T04:37:55+00:00 2020-10-28T04:37:55+00:00In: Class 9

Write an expression for the work done when a force is acting on an object in the direction of its displacement.

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NCERT Solutions for Class 9 Science Chapter 11
Important NCERT Questions
Work and Energy
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-149
Questions No-2

2020-2021cbsechapter 11class9ncertsciencework and energy
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    1. kokila
      2023-11-28T05:20:47+00:00Added an answer on November 28, 2023 at 5:20 am

      1. Work Done Formula:
      – The formula for work done Work is given by:
      Work = Force x Distance x cos(θ)
      – It calculates the amount of energy transferred when a force causes an object to move a certain distance.

      2. Force in the Same Direction:
      – When a force and the direction of an object’s movement are the same, the angle θ between them is 0°
      – The cosine of 0° is 1(cos(0°) = 1 ), so Work = Force x Distance x 1

      3. **Simplified Expression:**
      – For a force acting in the direction of displacement, the expression simplifies to Work = Force x Distance.

      4. Interpretation:
      – This formula shows that when a force is applied in the same direction as the displacement, the work done is directly proportional to both the force applied and the distance the object moves.

      Understanding this formula helps us calculate the work done when a force is applied to an object and it moves in the same direction as the force. In such cases, the work done can be calculated straightforwardly using the force applied and the distance covered by the object.

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    2. Rachna
      2021-07-31T11:20:12+00:00Added an answer on July 31, 2021 at 11:20 am

      Get Hindi Medium and English Medium NCERT Solution for Class 9 Science to download.
      Please follow the link to visit website for first and second term exams solutions.
      https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-11/

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