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A body is pushed through 5 m across a si...

A body is pushed through 5 m across a sirface affering 75 N resistance How much work is done by the (1) applied force (ii) resisting force ?

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(i) `F=75N, d=5 m`
Work done by applied force `=W=Fdcos0^(@)=75xx5xx1=375J`
(ii) Work done by resisting force `=Fdcos180^(@)`
`=75xx5xx(-1)=-375J`
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AAKASH INSTITUTE-WORK, ENERGY AND POWER-Assignment (SECTION - D)
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  3. A : The change in kinetic energy of a particle is equal to the work do...

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  4. A : Internal forces can change the kinetic energy but not the momentum...

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  5. A : The potential energy can be defined only in conservative field. ...

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  6. A : When a body moves in a circle the work done by the centripetal for...

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  7. A : If net force acting-on a system is zero, then work done on the sys...

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  8. A : During collision between two objects, the momentum of colliding ob...

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  9. A : The potential energy of a system increases when work is done by co...

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  10. A : In inelastic collision, a part of kinetic energy. convert into hea...

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  11. A : Energy dissipated against friction depends on the path followed. ...

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  12. A : Work done by the frictional force can’t be positive. R : Fricti...

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  13. A : Impulse generated on one body by another body in a perfectly elas...

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  14. A : Power of the gravitational force on the body in a projectile motio...

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  15. A : Power delivered by the tension in the wire to a body in vertical c...

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  16. A : When a man is walking on a rough road, that work done by frictiona...

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