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Physics
15. Laws of Motion and Gravitation
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Q14 of 46 Page 247

Renu is standing in a dining line 6.38 x 103 km from the centre of the earth. The mass of the earth is 6 x 1024 kg.

Will the value change after she finishes her lunch?

No, g is independent of her mass, so it will not change after she finishes her lunch though her mass has changed slightly.


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13

If the density of the earth is doubled to that of its original value, the radius remaining the same, what will be the change in acceleration due to gravity?

14

Renu is standing in a dining line 6.38 x 103 km from the centre of the earth. The mass of the earth is 6 x 1024 kg.

Find the acceleration due to gravity.

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If an angel visits an asteroid called B 612 which has a radius of 20 m and mass of 104 kg, what will be the acceleration due to gravity in B 612?

16

A man of mass ‘m’ standing on a plank of mass ‘M’ which is placed on a smooth horizontal surface, is initially at rest. The man suddenly starts running on the plank with a speed of ‘v’ m/s with respect to the ground. Find the speed of the plank with respect to the ground.

Questions · 46
15. Laws of Motion and Gravitation
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