# Explain What is Meant by the Equation : Where the Symbols Have Their Usual Meanings. - Science

Short Note

Explain what is meant by the equation :
g= Gxxm/r^2
where the symbols have their usual meanings.

#### Solution

g = GM /R2
This is an equation , which expresses acceleration due to gravity. It states that acceleration due to gravity (g) can be calculated as a product of the Gravitational Constant (G), which is 6.673 × 10−11 Nm2 kg−2 and mass of the planet (M) i.e., 5.98 × 1024 kg in case of the earth divided by square of radius of that planet (R), i.e., 6.4 ×106 m for earth. This is an equation, which expresses acceleration due to gravity. By putting the respective values for earth, g can be calculated as 9.8 m/s2.

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#### APPEARS IN

Lakhmir Singh Science Class 9 Physics
Chapter 3 Gravitation
Short Answers | Q 27 | Page 101