Give reason :

(i) What is meant by acceleration due to gravity?

(ii) Value of ‘g’ is not constant on the surface of earth.

(iii) Objects of different masses take same time to fall from a fixed height.

(iv) ‘G’ is known as gravitational constant. Write its SI unit.

Ans. (i) It is the acceleration with which a free falling body approaches the earth.

(ii) It is due to the fact that the radius of the earth varies from equator to the poles.

(iii) The acceleration due to gravity is given by the expression g = GM / R² ” where R is the radius of the earth and M is its mass. As mass of the object does not come in the expression for ‘g’, therefore, all objects fall towards the earth with the same acceleration. Thus, if they fall from a fixed height, they will take the same time.

(iv) It is because its value is constant throughout the universe. It is measured in N m² kg-².

Follow on Facebook page – Click Here

Google News join in – Click Here

Read More Asia News – Click Here

Read More Sports News – Click Here

Read More Crypto News – Click Here