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Explain what is meant by work. Obtain an...

Explain what is meant by work. Obtain an expression for work done by a constant force.

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Work done by a spning force is

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Knowledge Check

  • Work done by a spning force is

    A
    Always negative
    B
    Always positive
    C
    Always zero
    D
    may be positive and negative

  • Work done by a frictional force is

    A
    negative
    B
    positive
    C
    zero
    D
    all of the above

  • Work done by frictional force

    A
    Is always negative
    B
    Is always positive
    C
    Is zero
    D
    May be positive, negative or zero
    • PRADEEP-WORK, ENERGY AND POWER-Long Answer Question
    1. Explain what is meant by work. Obtain an expression for work done by a...

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    2. What is meant by positive work, negative work and zero work ? Illustra...

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    3. Obtain graphically and mathematically work done by a variable force.

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    4. What are conservative and non-conservative forces, explain with exampl...

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    5. What is meant by power and energy ? Give their units.

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    6. Explain the meaning of K.E. with examples. Obtain an expression for K...

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    7. State and explain work energy principle.

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    8. What do you mean by potential energy ? Give any two examples of potent...

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    9. Derive the expression for gravitational potential energy?

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    10. Explain what is meant by potential energy of a spring ? Obtaining an e...

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    11. Mention some of the different forms of energy and discuss them briefly...

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    12. What is meant by mass energy equivalence ? Discuss its significance in...

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    13. State and establish principle of conservation of energy.

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    14. How do vibrations of a simple pendulum and motion of a ball over a wat...

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    15. What is meant by a collision ? Discuss two types of collision with the...

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    16. Discuss elastic collision in one dimension. Obtain expressions for vel...

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    17. Discuss briefly inelastic collisions in one dimension.

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    18. Give a brief account of elastic collisions in two dimensions.

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    19. Briefly analyse inelastic collision in two dimensions.

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    20. A block of mass 1kg is pushed up a surface inclined to horizontal at a...

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