The depth from the surface of the earth where acceleration due to gravity is `20%` of its value on the surface of the earth is (R = 6400 km)

Question

The depth from the surface of the earth where acceleration due to gravity is `20%` of its value on the surface of the earth is (R = 6400 km)

The depth from the surface of the earth where acceleration due to gravity is `20%` of its value on the surface of the earth is (R = 6400 km)
A. 1280 km
B. 5120 km
C. 128 km
D. 640 km

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - b
`g_(d)=g(1-(d)/(R)) therefore 0.2=1-(d)/(6400)`
`therefore d= 0.8xx6400" "therefore d=5120km.`

4 views Answered 2023-02-05 15:29