Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES)
A tunnel is dug along a diameter of the earth. If `M_e & R_e` are the mass & radius of the earth respectively. Then the force on a particle of mass m placed in the tunnel at a distance r from the center is:
A. |
`(GM_em)/R_e^3.r` |
![]() |
B. |
`(GM_e)/R_e^3.m/r` |
C. |
`(GM_em)/r . R_e^3` |
D. |
`(GM_em)/R_e^2 . r` |