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30 October, 12:41

A box has a mass of 400 g. What minimum force is needed to lift it?

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  1. 30 October, 16:20
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    Answer: 3.92 N.

    Explanation:

    Your box weighs 400g, or 0.4kg. In order to lift it, you need to overcome the force of gravity. F = ma, and acceleration due to gravity is - 9.8 m/s^2. So gravity acts on the box with a force of 0.4 kg * - 9.8 m/s^2 = - 3.92 N. A force of + 3.92 N is required to overcome this.
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