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Standard XII

Physics

Measuring Mass

If mass of ea...

Question

If mass of earth is M, radius is R and gravitational constant is G, then work done to take 1 kg mass from earth surface to infinity will be

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Solution

The correct option is B

Ptential energy of the 1 kg mass which is placed at the earth surface =- $\frac{G M}{R}$
its potential energy at infinite =0
$∴$ Work done = change in potential energy = $\frac{G M}{R}$

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If mass of earth is M, radius is R and gravitational constant is G, then work done to take 1 kg mass from earth surface to infinity will be

The correct option is B Ptential energy of the 1 kg mass which is placed at the earth surface =-GMR its potential energy at infinite =0 ∴ Work done = change in potential energy =GMR

The correct option is B

Ptential energy of the 1 kg mass which is placed at the earth surface =- $\frac{G M}{R}$
its potential energy at infinite =0
$∴$ Work done = change in potential energy = $\frac{G M}{R}$