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Work done by gravitational force on a fr...

Work done by gravitational force on a freely falling body ………….

A

negative

B

0

C

positive

D

both A & C

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • (A) : Work done by gravitational force in moving a body is path independent (R ) : Gravitational force is non conservative force.

    A
    Both (A) and (R ) are true and (R ) is the correct explanation of (A)
    B
    Both (A) and (R ) are true and (R ) is not the correct explanation of (A)
    C
    (A) is true but (R ) is false
    D
    (A) is false and (R ) is false

  • (A): Work done by gravitational force in moving a body is path independent (R ): Gravitationa lforce is non conservative force.

    A
    Both 'A' and 'R' are true and 'R' is the correct explanation of 'A's
    B
    Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A's
    C
    A' is true and 'R ' is false
    D
    A' is false and 'R' is true

  • Statement - A : Work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket is positive. Statement - B : Work done by gravitational force in lifting a bucket out of a well by means of a rope tied to the bucket is negative. Statement - C : Work done by friction on a body sliding down an inclined plane is negative. Statement - D : Work done by an applied force on a body moving on a rough horizontal plane with uniform velocity is positive. Statement - E : Work done by the resistive force of air on a vibrationg pendulum in bringing it to rest is negative.

    A
    A, B, E are true
    B
    B, C, D are true
    C
    C, D, E are true
    D
    A, B, C, D, E are true

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    State the sign of work done by a force in the following . Work done by gravitational force in lifting a bucket out of a well by means of a rope tied to the bucket.

    State and prove low of conservation of energy incase of a freely falling body .

    State and prove law of conservation of energy is case of a freely falling body .

    The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative : Work done by gravitational force in the above case

    The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative : Work done by gravitational force in the above case

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