The earth's gravitational field intensity at its surf...
The earth's gravitational field intensity at its surface is about
(G = 6.7 × 10−11Nm2/kg2, mass of the earth is 6 × 1024kg, radius of the earth is 6.4 × 106m, g on the earth = 9.8m/s2)
6.7N/kg
7.9N/kg
8.0N/kg
9.8N/kg
Correct answer is D
| E | = | F
m |
= | GMm/d2
m |
= | GM
d2 |
| E | = | 6.7 × 10−11 × 6 × 1024
(6.4 × 106)2 |
= | 9.8N
kg |
E = g = 9.8N/kg