Q13 of 805 Page 169

The gravitational force between two objects is F. If the masses of both objects are halved without changing distance between them, then the gravitational force would become

Gravitational Force F = G m₁ m₂ / r²

Where, m_1, m₂ are masses of two objects and r is distance between them.

When the masses are halved then F =

= (Gm₁m₂/ r² )

= F/4

According to the third law of motion, action and reaction

The value of acceleration due to gravity

Among the given options, which one is not correct for the use of large amount of fertilisers and pesticides?

Find out the correct sentence

(i) Hybridization means crossing between genetically dissimilar plants.

(ii) Cross between two varieties is called as inter specific hybridisation.

(iii) Introducing genes of desired character into a plant gives genetically modified crop.

(iv) Cross between plants of two species is called as inter varietal.