Think logically not mathematically [part-19]

If a man's mass is 60 kg on earth then what will be his mass be on the moon?

Assumptions and Details

  • The gravitational field strength at the surface of the Earth as 10 m/s 2 10\text{m/s}^2
25 kg 60 kg 10 kg Cannot be determined 0 kg 30 kg 15 kg 35 kg

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2 solutions

Sudoku Subbu
Feb 16, 2015

In moon , the force of gravity is 1 6 \frac{1}{6} th that of earth that is force of gravity on the moon is 10 6 \frac{10}{6} the mass of the man [m] is 60 10 = 6 k g \frac{60}{10}=6 kg therefore the mass on the moon is m g m = 6 × 10 6 = 10 k g mg_{m}=6\times\frac{10}{6}=10 kg

That's inaccurate. You're referring to weight, not mass. The mass, unlike weight, is constant and independent of g. The two are related by W = mg from Newton's 2nd Law of Motion : F = ma.

Adrian Johnson - 6 years, 1 month ago

Well, your answer is wrong.

Sahba Hasan - 5 years, 10 months ago

Keep in mind that MASS is constant everywhere. By definition, mass is the amount of matter present in an object. It is therefore a quantitative measure of inertia wherein the object tends to not move at all, unless acted upon by forces. So, in a hilarious way of explaining the inertial state of every matter in the universe, you need to exert an "effort" just to move a heavy elephant, which doesn't want to move at all, to the streets or to move yourself from a state of laziness or "unmotivated state."

Weight, however, is different from mass (and I get the confusion for these comments, so let us revise the existing explanation here) . Although it is related to mass, it does not mean they are one and the same. The WEIGHT of an object varies, and this depends upon the gravitational field that objects exert upon from one another and to each other. In short, the forces acting upon you depends on from where you are in the gravitational field; thus from the famous equation: F o r c e = m a s s × a c c e l e r a t i o n Force=mass \times acceleration .

PS: For bonus fact, the SI unit of MASS is kilogram, k g kg , which is defined as the "mass of a body if its rest energy is equal to the energy of 1.4755214 × 1 0 40 1.4755214 \times 10^{40} Caesium photons. It is a scalar quantity. On the other hand, WEIGHT has the SI Unit for Newton, N N , which is also expressed as k g m / s 2 kg \cdot m/s^{2} . It is a vector quantity.

There is no element that is named caesium. It is cesium.

. . - 1 month, 3 weeks ago

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Oh, I think the thing with ae is British tho. Whatever it is, they are still the same Cs.

John Bryan Galiza - 1 month, 3 weeks ago

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