Question

at a certain distance above earth's surface, the gravitational force on a certain object is only 2.8% of its value at earth's surface. determine this distance, expressing it as a multiple of earth's radius

Step 1

The gravitational force of attraction on the object at the earth’s surface is,

Step 2

The gravitational force of attraction on the object at a certain distance above the earth’s surface is,

Step 3

Now,

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