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प्रश्न
Explain what is meant by the equation :
`g= Gxxm/r^2`
where the symbols have their usual meanings.
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उत्तर
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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संबंधित प्रश्न
A ball is thrown vertically upwards with a velocity of 49 m/s. Calculate
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- the total time it takes to return to the surface of the earth.
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The acceleration due to gravity acting on a freely falling body is directly proportional to the mass of the body.
What do you mean by the term free fall ?
The values of g at six distances A, B, C, D, E and F from the surface of the earth are found to be 3.08 m/s2, 9.23 m/s2, 0.57 m/s2, 7.34 m/s2, 0.30 m/s2 and 1.49 m/s2, respectively.
(a) Arrange these values of g according to the increasing distances from the surface of the earth (keeping the value of g nearest to the surface of the earth first)
(b) If the value of distance F be 10000 km from the surface of the earth, state whether this distance is deep . inside the earth or high up in the sky. Give reason for your answer.
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Name the force which pulled the apple off Isaac Newton’s tree.
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Define acceleration due to gravity.
