Free Body Diagram

Free Body Diagram | A block rest on horizontal Surface | Learn begginer to Advance Study | Part: 1

👉A block rest on a frictionless horizontal surface and the blocked pulled horizontally with a force $F$.

From the free body diagram, here we get,
$R = mg$ and
${F_{net}} = ma$

👉A block rest on a horizontal surface where coefficient of friction between block and the surface is $\mu$ and the block pulled horizontally with a force $F$

From the free body diagram we get,
$R = mg$ and

$F - f = ma$
or, $F - \mu mg = ma$
or, $a = \frac{{F - \mu mg}}{{ma}}$

👉A block rest on a horizontal surface and a pull is acting at an angle $\theta$ to the horizontal in upward direction.

From the free body diagram we get,
$R + F\sin \theta = mg$
or, $R = mg - F\sin \theta$ and

the net effective force on the block along horizontal direction is $F\cos \theta$.
Therefore, $F\cos \theta = ma$
or, $a = \frac{{F\cos \theta }}{m}$

👉A block rest on a horizontal plane and a pushing force $F$ acts downward direction at an angle $\theta$ to the horizontal.

From the free body diagram we get,
$R = mg\sin \theta + mg$ and

net effective force of the block along horizontal direction is $F\cos \theta$.
Therefore, $F\cos \theta = ma$
or, $a = \frac{{F\cos \theta }}{m}$