Question

Pls answer fast and correct

1.If a body of mass 100 kg starts falling towards the earth when it is at a height of 12800 km from earth surface, with what velocity will it is strike the Earth surface?

2.. Three point masses each of 1 kg are kept at three corners of an equilateral triangle. Another point mass of 1 kg is kept at the centroid of the triangle. If the distance of the centroid from each corner is 1 m then calculate
A. the gravitational force on the mass at the centroid.
B. force on the same mass at the centroid if mass at any one corner is
removed.

3. A tunnel is dug across the diameter of the earth and a body of mass 1 kg is dropped from one side. what will be its speed when it is at a depth of 3200 km from Earth's surface?

Answer 1

Answer:

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Explanation:

Mass= 100

height =12800