Question

A particle moves under a central force field. The quantity   [d2/dθ2  (1/r)]  is proportional to 1/r. The symbols have standard meaning. The magnitude of the force is proportional to

(a) 1/r2

(b) 1/r

(c) 1/ r3

(d) r
(e) none of these​

Answer 1

Answer:

its simple

the answer is d r

Answer 2

Answer:

option (d) is correct answer