Question

Mass of particles of 1 kg each are placed along x axis at

Answer 1

Missing point in question :-

Mass particle of 1kg is placed along at x axis at x=1,2,4,8.......infinity. Then gravitational forcre on a mass of 3kg placed at origin is G=universal gravitational constant). 4G, 4G/3, 2G, infinity. Which option is correct?

Answer :-

Fnet = 3 G [ 1/1² + 1/2² + 1/4³ + 1/8² + .... ]

Fnet = 3 G x 1 /1-r -- since  1/1² + 1/2² + 1/4³ + 1/8² + . is in GP with r = 1/2² = 1/4

Fnet = 3 G x 1 /1-(1/4)

Fnet = 3 G x 4/3

Fnet = 4G

Answer 2

Answer:

4G is the answer

this is the required answer hope it helps