# physics

gravity on the surface of the moon is only 1/6 as strong as the gravity on earth. What is the weight of a 39kg on the earth?

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1. 39/6 kg of weight = 6.5 kg(wt)
Since you are talking physics, it is better to express the answer in Newtons
W = M (g/6) = 63.7 newtons.

There is nothing wrong with measuring weights in kg, but kg is really a mass measurement and newtons should be used for force and weight. Weight varies with the local value of the acceleration of gravity.

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2. how much acceleration does a 747 jumbo jet of mass 30,000 kg experience in takeoff when the thrust for each of four engines is 30,000?

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