Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 11

# A Boy is Sitting on a Chair Placed on the Floor of a Room. Write as Many Action-reaction Pairs of Forces as You Can. - Physics

Short Note

A boy is sitting on a chair placed on the floor of a room. Write as many action-reaction pairs of forces as you can.

#### Solution

The given situation involves two action-reaction pairs of forces. They are :

(a) The action force (F = mg) with which the boy pushes the chair in the downward direction and the reaction force (F' =$-$mg) with which the chair exerts on the boy in the upward direction.

(b) The action force (F = (M + m)g) with which the boy and the chair push the ground in the downward direction and the reaction force (F' = (M + m)g) with which the ground exerts on the boy and the chair in the upward direction.

Concept: Work Done by a Constant Force and a Variable Force
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#### APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 1
Chapter 4 The Forces
Short Answers | Q 2 | Page 61
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