Which of the following activities is easier to perform?

dragging a box

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lifting a box

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rolling a drum of same weight as box

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all of the above need same effort

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Solution

The correct option is D rolling a drum of same weight as box
The drag menas air resistance or fluid resistane. So the dragging a box means that the box is pulled against the air or fluid flow. The lifting box means that it is pulled against gravity. The rolling drum means it is moving on a horizontal or incline plane. Thus, the friction force will less for rolling drum and so it will be easier activity.

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