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Statement-1: A person walking on a horiz...

Statement-1: A person walking on a horizontal road with a load on his head does no work on the load against gravity.
Statement-2: No work is said to be done, it directions of force and displacement of load are perpendicular to each other.

A

Statement-1 is true, Statement-2: is true, Statement-2 is a correct explanation for Statement-1.

B

Statement-1 is true, Statement-2: is true, Statement-2 is NOT a correct explanation for Statement-1.

C

Statement-1 is true, Statement-2 is false

D

Statement-1 is false, Statement-2 is true

Text Solution

Verified by Experts

The correct Answer is:
A
`W=FS cos theta`, if `theta=90^(@)` then `W=0`
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RESONANCE-WORK POWER AND ENERGY-Exercise
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  5. An electric motor creates a tension of 4500 newton in a hoisting cable...

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  6. The potential energy of a partical veries with distance x as shown in ...

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  7. The potential energy of a force filed vec(F) is given by U(x,y)=sin(x+...

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  8. A spring of force constant 800N//m has an extension of 5cm. The work d...

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  9. A body is moved along a straight line by a machine delivering constant...

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  10. The total work done on a particle is equal to the change in its mechan...

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  11. A ring of mass m can slide over a smooth vertical rod. The ring is con...

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  12. The kinetic energy of a particle continuously icreses with time

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  13. If force is always parallel to motion

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  14. The given plot shows the variation of U, the potential energy of inter...

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  15. A body of mass 5 kg is acted upon by a variable force.the force varies...

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  16. An elevatore weighinig 500kg is to be lifted up at a constant velocity...

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  17. A car of mass m is driven with acceleration a along a straight level r...

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  18. The potential energy of a system increased if work is done

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  19. Statement-1: A person walking on a horizontal road with a load on his ...

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  20. Statement-1: Graph between potential energy of spring versus the exten...

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