Gravitation Tes...

The weight of an object changes in water as it displaces 20 kg of the water. The mass of this object is 60 kg.

The densities of four objects are shown in the given table. Equal quantities of these objects are immersed in a jar filled with mercury (ρ = 13.59 g cm⁻³).

Object

Density (g/cm³)

I

0.34

II

7.87

III

0.86

IV

2.56

The constant of proportionality in Newton’s law of gravitation is known as the universal gravitational constant (G). Its magnitude is a × 10^b Nm² kg⁻².