Question

give reason 1.a) we are pulled by the earth but not by a chair.

Answer 1

Answer:

we are pulled by earth because of gravity chair does not pull us

Answer 2

Required Answer:-

We are pulled by earth but no by a chair or other objects because earth have its gravity and it's proven by Newton's law of motion. Gravitational force of earth is 9.8 m/s².

Explanation:

Every object on earth stays on its position untill an external force is applied to it and this is because of gravity. Gravitational force along with mass of any object acts on body i.e. mg.

• We are pulled by earth not by a chair because earth has its own gravitational constant not chair.
• We are pulled because force mg is acting on us which keeps us pulled.
• Chair is an object which is also pulled by earth's gravitational force mg.

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Example:

If a body's mass is 5kg and gravitational force acting on it is 9.8 m/s². Find the value of force ?

Solution:

$\implies \sf F = mg$

$\implies \sf F = 5 \times 9.8$

$\implies \sf F = 49 \: N$