a metal bar has a frictionless axle going through its center of mass. you notice that the bar is not level, but that it is tilted at a 30 degree angle (the right end is below the horizontal and the left end is above the horizontal) and that the bar is not translating through space or rotating away from this orientation. you can say that:

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a metal bar has a frictionless axle going through its center of mass. you notice that the bar is not level, but that it is tilted at a 30 degree angle (the right end is below the horizontal and the left end is above the horizontal) and that the bar is not translating through space or rotating away from this orientation. you can say that:

Answer :

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Contexto1025go Contexto1025go · Answer 1

Using the concepts of Force and Torque, we got net Force isn`t zero and net torque is clockwise in nature on the metal bar.

We know very well when any object is placed at some angle with other object or surface, the Normal of that object divides into two components.

Means sine and cosine, they will start acting on that metal bar and try to balance the metal bar.

So, suppose metal bar has length L, and if metal bar is making an angle 30. with the origin point, in that component of Acceleration due to gravity in y direction gets component gcosine and acceleration due to gravity got gsine along negative x-axis

Now we know that cos30° is greater than sin30° it means both component will not be equal.

Therefore, net Force acting on metal bar =Force along Y axis-Force along x axis

=>Net Force=Mgcos30-Mgsin30

=>Net Force=Mg([tex]\sqrt{3}[/tex]/2-1/2)

>Net Force=Mg([tex]\sqrt{3}[/tex]-1)/2,which is greater than zero.

Hence, net force is not zero.

Now talking about torque as force is not zero, and we know that

Torque=Force × Perpendicular Distance

Therefore, net torque is also not zero and it will rotate the metal bar in clockwise order.

Hence, net force is not zero and torque acts in clockwise sense on metal bar.

To know more about Force and Torque, visit here:

https://brainly.com/question/19247046?

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