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A clerk can lift cylindrical packages 1 meter vertically, or can roll them up a 2-meter-long ramp to the same elevation. With the ramp, the applied force required is aboutA. twice as much.B. half as muchC. four times as muchD. the same

Respuesta :

Answer:

Explanation:

For lifting the object vertically , force to be applied is equal to its weight

So in the first case applied force = mg

In the second case , Only a  component of mg acts along the ramp which is equal to mg sinθ where θ is inclination of ramp with horizontal

Here sinθ = 1/2

So force required = mg sinθ

= mg x 1/2

1/2 mg

So option  B is correct.

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