Question

Show that acceleration due to gravity (g) is constant. class 9​

Answer 1

Explanation:

F = Gm1m2/r^2

Here, F = force

G = Universal gravitational constant

m1 = mass of 1st object

m2 = mass of 2nd object

r = distance between the objects

As gravity is a force, to find its value we need to use the above formula.

Put the value of G = 6.674 × 10^-11

In place of m1, mass of earth = 6 × 10^24

In place of m2, mass of an object = 1kg (say)

In place of r, radius of the earth as the object would be at the surface of the earth which is at a distance of radius of the earth from its surface

= 6378

Now put the values in the above equation and you will get the answer as 9.8N which is a constant value

Answer 2

1. gravitational constant is numerical equal to force of attraction of two masses of 1kg and that are separated by distance 1m.

2. G is a scalar quantity.

3.Thr G is a universal constats its value is same in the universe. (6.7×10^-22Nm^2Kg ^2.