Universal Law of Gravitation

When is the $\text{'}g\text{'}$ negative?

The weight of an object above the earth is reduced.

The weight varies with height above the earth.

The value of the universal gravitational constant is _____$\times {10}^{-11} \mathrm{N} {\mathrm{m}}^2 {\mathrm{kg}}^{-2}$. (Answer upto two decimal places).

A thunder cloud may have a mass of about $2\times {10}^6 \mathrm{kg}$. The weight of this thunder cloud is $1.96\times {10}^n \mathrm{N}$. Find the value of $n$.

$\left(g=9.8 \mathrm{N} {\mathrm{kg}}^{-1}\right)$

Imagine you were cycling to the top of the hill. Did you need to apply more force? Was the force applied the same when you were cycling down? Why?

A ripe fruit falls from a tree due to Earth's gravity.  

The earth has got its own pulling force called the _____ force.

Name the force that pulls every object downwards towards the centre of the Earth.

Gravitational force helps in writing in the notebook. 

The force with which earth pulls objects towards itself is called magnetic force. 
 

Force that holds you to the ground is

What is gravitational force? How is it useful for us?  

Define gravitation.