Question

a. Find the height from the earth's surface where g will be 25% of its value on the surface of earth (R=6400km). b. Find the percentage increase in the value of g at a depth h from the surface of earth.

Answer 1

Answer:

5

Explanation:

12345

12334

1234

5

therefore an swer is 5

Answer 2

Explanation:

acceleration due to gravity= GM/r²

g at surface = GM/R²

Now GM/r² = 0.25 * GM/R²

r = 2R = 12800km