Question

A particle of mass m is dropped from a height R
equal to the radius of the earth above the tunnel dug
through the earth as shown in the figure. Hence the
correct statement is


(1) Particle will oscillate through the earth to a height
h = R on both sides
(2) Motion of the particle is periodic
(3) Motion of the particle is simple harmonic
Both (1) & (2)
protod​

Answer 1

Answer:

option 1 is correct.

Explanation:

first see attachment.

in figure i pointed 3 points namely A,O,B

1. if an object is dropped at point A ,it will be attracted towards centre of earth O due to gravitational force.
2. After reaching centre it will continue its motion towards B.
3. at B again the object will attracted towards centre.
4. after reaching centre it will continue its motion towards A

like this the motion of object will be continued.