Write True or False

Question 11 Mark

At the height of 'h' from the ground, the gravitational potential energy is $\frac{- GMm }{ R + h }$.

Answer

True

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Question 21 Mark

The mass of the Earth is $6.4 \times 10^6 \ kg$.

Answer

False

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Question 31 Mark

Weight is a vector quantity.

Answer

True

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Question 41 Mark

Beyond the surface of the Earth, g $\alpha \frac{1}{(R+h)^2}$.

Answer

True

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Question 51 Mark

Mass is a scalar quantity.

Answer

True

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Question 61 Mark

g' is called universal constant.

Answer

False

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Question 71 Mark

At poles, the acceleration due to gravity is $9.77 m/s^2$.

Answer

False

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Question 81 Mark

The gravitational acceleration does not become zero at the centre of the Earth.

Answer

False

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Question 91 Mark

The force towards the centre of the circular orbit is called centripetal force.

Answer

True

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Question 101 Mark

$1$ dyne $= 10^5 \ N.$

Answer

True

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Question 111 Mark

$1 \ N = 1 \ kg \times 1 m/s^2.$

Answer

True

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Question 121 Mark

Gravitational force at the Moon is double than the Earth's gravitational force.

Answer

False

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Question 131 Mark

Acceleration is a scalar quantity.

Answer

False

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Question 141 Mark

G' is called gravitational acceleration.

Answer

False

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Question 151 Mark

Force = mass × velocity

Answer

False

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