\( A B C \) is an equilateral triangle with \( O \) as its centre. \( \vec{F}_{1}, \vec{F}_{2} \...

Channel:
PW Solutions
Subscribers:
449,000
Published on ● Video Link: https://www.youtube.com/watch?v=bcsD4T_733c


Duration: 1:04
66 views
1

\( A B C \) is an equilateral triangle with \( O \) as its centre. \( \vec{F}_{1}, \vec{F}_{2} \) and \( \vec{F}_{3} \) represent three forces acting along the sides \( A B, B C \) and \( A C \) respectively. If the total torque about \( O \) is zero then the magnitude of \( \vec{F}_{3} \) is
[CBSE PMT (Pre.) 2012]
(a) \( F_{1}+F_{2} \)
(b) \( F_{1}-F_{2} \)
(c) \( \frac{F_{1}+F_{2}}{2} \)
(d) \( 2\left(F_{1}+F_{2}\right) \)
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2022-10-27The total torque about pivot \( A \) provided by the forces shown in the figure, for \( L=3.0 \m...
2022-10-27A pulley of radius \( 2 m \) is rotated about its axis by a force \( F=\left(20 t-5 t^{2}\right)...
2022-10-27A solid cylinder is rolling down on an inclined plane of angle \( \theta \). The coefficient of ...
2022-10-27A wheel of radius \( R \) with an axle of radius \( R / 2 \) is shown in the figure and is free ...
2022-10-27A string is wound round the rim of a mounted flywheel of mass \( 20 \mathrm{~kg} \) and radius \...
2022-10-27An automobile moves on a road with a speed of \( 54 \mathrm{kmh}^{-1} \). The radius of its whee...
2022-10-27A road of weight \( W \) is supported by two parallel knife edges \( A \) and \( B \) and is in ...
2022-10-27A solid cylinder of mass \( 50 \mathrm{~kg} \) and radius \( 0.5 \mathrm{~m} \) is free to rotat...
2022-10-27A horizontal force \( F \) is applied such that the block remains stationary then which of the f...
2022-10-27A ladder rests against a frictionless vertical wall, with its upper end \( 6 m \) above the grou...
2022-10-27\( A B C \) is an equilateral triangle with \( O \) as its centre. \( \vec{F}_{1}, \vec{F}_{2} \...
2022-10-27Let the moment of inertia of a hollow cylinder of length \( 30 \mathrm{~cm} \) (inner radius \( ...
2022-10-27The instantaneous angular position of a point on a rotating wheel is given by the equation \( \t...
2022-10-27A smooth wire of length \( 2 \pi r \) is bent into a circle and kept in a vertical plane. A bead...
2022-10-27A door \( 1.6 \mathrm{~m} \) wide requires a force of \( 1 \mathrm{~N} \) to be applied at the f...
2022-10-27A constant torque of \( 31.4 N-m \) is exerted on a pivoted wheel. If angular acceleration of wh...
2022-10-27A uniform \( \operatorname{rod} A B \) of length \( l \) and mass \( m \) is free to rotate abou...
2022-10-27Let \( \vec{F} \) be the force acting on a particle having position vector \( \vec{r} \) and \( ...
2022-10-27A uniform cylinder has a radius \( R \) and length \( L \). If the moment of inertia of this cyl...
2022-10-27From a circular disc of radius \( R \) and mass \( 9 \mathrm{M} \), a small disc of mass \( M \)...
2022-10-27From a disc of radius \( R \) and mass \( M \), a circular hole of diameter \( R \), whose rim p...


Tags:
pw