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Melissa uses bags of mulch that weigh 40 pounds each. She needs to carry 10 bags to her truck. She usually carries one bag at a time. Would she do less work if she carried two bags at a time?

No; she would have to use half the force over twice the distance.

Yes; she makes fewer trips, decreasing the distance.

No; she would have to use twice the force over half the distance.

Yes; she decreases both force and distance.

Respuesta :

NO:she would have to use twice the force over half the distance

Answer: Option (a) is the correct answer.

Explanation:

Work done is related to force as force times displacement.

Mathematically,           W = F × d

where       W = work

                 F = force

                 d = displacement

Therefore, when Melissa carried two bags at a time then she is applying twice the force she was applying earlier. Hence, she have to apply half the force twice the distance.

Thus, we can conclude that no; she would have to use half the force over twice the distance.

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