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A force acts perpendicular to the direct...

A force acts perpendicular to the direction of motion of a body. What is work done?

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Work done `=` Zero , as there is no displacement in the direction of force.
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The initial speed of a body of mass 2kg is 5ms^(-1) A force acts for 4 seconds in the direction of motion of the body. The force time graph is shown in Calculate impulse of the force and also find the speed of the body . .

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What should be the angle between the direction of motion of a body so that the work done is zero ?

How is work done measured when, The force is inclined to the direction of motion of the body?

Force acting on a particle does some work only when force has a component along the direction of motion of particle, force has a component opposite to direction of motion of particle force has a component perpendicular to direction of motion of particle. IV. force is not able to move the particle. Which of the following statement(s)) is/are correct?

How is work done measured when, The force acts along the direction of motion of the body

Work is said to be done by a force acting on a body, provided the body is displaced actually in ay direction except in a direction perpendicular to the direction of the force. Mathmatically, W=vec(F). vec(c)=Fs cos theta , Whereas eenrgy is capacity of a body to do the work, power is the rate at which the body can do the work. P=(W)/(t)=vec(F).(vec(s))/(t)=vec(F). vec(upsilon) Both, work and energy are measured in joule and power is measured in watt. With the help of the comprehension given above, choose the most appropriate alternative for each of the following question : In the above question, work done by the resisting force is

Work is said to be done by a force acting on a body, provided the body is displaced actually in ay direction except in a direction perpendicular to the direction of the force. Mathmatically, W=vec(F). vec(c)=Fs cos theta , Whereas eenrgy is capacity of a body to do the work, power is the rate at which the body can do the work. P=(W)/(t)=vec(F).(vec(s))/(t)=vec(F). vec(upsilon) Both, work and energy are measured in joule and power is measured in watt. With the help of the comprehension given above, choose the most appropriate alternative for each of the following question : In the above question, work done by gravity is

Knowledge Check

  • Force acting on a particle does some work only when force has a component along the direction of motion of particle. force has a component opposite to direction of motion of particle. force has a component perpendicular to direction of motion of particle. force is not able to move the particle. Which of the following statement is/are correct ?

    A
    I and II
    B
    II and III
    C
    III and IV
    D
    IV and I

  • Force acting on a particle does some work only when force has a component along the direction of motion of particle, force has a component opposite to direction of motion of particle force has a component perpendicular to direction of motion of particle. IV. force is not able to move the particle. Which of the following statement(s)) is/are correct?

    A
    I and II
    B
    II and III
    C
    III and IV
    D
    IV and I

  • Assertion : Friction is a force which acts in the direction of motion of a body. Reason: Polishing a surface reduces friction of the surface.

    A
    If both assertion and reason are correct and reason is the correct explanation of the assertion
    B
    If both assertion and reason are correct, but reason is not the correct explanation of the assertion
    C
    If assertion is correct, but reason in incorrect
    D
    If assertion is incorrect, but reason is correct
    • PRADEEP-WORK, ENERGY AND POWER-Very Short Anwer Question.
    1. A force acts perpendicular to the direction of motion of a body. What ...

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    2. What is work done when a body is moving at constant speed over a frict...

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    3. State the factors on which work done by a force depends.

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    4. What should be the angel between the direction of force and displaceme...

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    5. What is work done by the force of tension in the string of a simple pe...

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    6. What is represented by area under the force displacement curve?

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    7. Give an example in which a force does work on a body but fails to chan...

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    8. Does a man standing at rest on a moving truck possess KE?

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    9. Out of joule, calorie, kilowatt and electron volt, which one is not th...

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    10. Is power a scalar or vector ?

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    11. Name the physical quantity, which is expressed as force times velocity...

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    12. When is KE of a planet revolving around the sunn maximum?

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    13. What is work done by centripetal force in moving on body half-cycle on...

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    14. Show graphically the variation of potential energy of an object thrown...

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    15. What is spring constant ? What are its SI units?

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    16. Name the process in which momentum changes but KE does not.

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    17. What is the source of KE of falling rain drops ?

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    18. What is work done in holding a 15kg suitcase while waiting for a bus f...

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    19. Is it practically possible to have situtations where (E-V)lt0?

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    20. Can K.E. of a system be increased or decreased without applying any e...

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