List all the forces acting on a boy sitting on a chair .

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Solution

The forces acting on a body sitting on a chair are
$1.$ Gravitational force (non contact) acting downwards, $F_{g r a v}$
$2.$ Normal contact force of the chair acting upwards $(F_{n o r m})$ . Both the forces are opposite and equal and balance each other.

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List all the forces acting on a boy sitting on a chair .

The forces acting on a body sitting on a chair are 1. Gravitational force (non contact) acting downwards, Fgrav 2. Normal contact force of the chair acting upwards (Fnorm). Both the forces are opposite and equal and balance each other.

The forces acting on a body sitting on a chair are
$1.$ Gravitational force (non contact) acting downwards, $F_{g r a v}$
$2.$ Normal contact force of the chair acting upwards $(F_{n o r m})$ . Both the forces are opposite and equal and balance each other.