Write the formula to find the magnitude of the gravitational force between the earth and an object on the surface of the earth. [2 MARKS]

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Solution

Each point: 1 Mark

1. Let $m_{1}$ be the mass of the Earth and $m_{2}$ the mass of an object on its surface. If r is the radius of the Earth, then according to the universal law of gravitation, the gravitational force (F) acting between the Earth and the object is given by the relation:

2. $F = \frac{G m_{1} m_{2}}{r^{2}}$

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Write the formula to find the magnitude of the gravitational force between the earth and an object on the surface of the earth. [2 MARKS]

Each point: 1 Mark 1. Let m1 be the mass of the Earth and m2 the mass of an object on its surface. If r is the radius of the Earth, then according to the universal law of gravitation, the gravitational force (F) acting between the Earth and the object is given by the relation: 2. F=Gm1m2r2