Please refernece attachment. See image for more information. A rod may freely rotate about an axis that is perpendicular to the rod andis along the plane of the page. The rod is divided into four sections ofequal length of 0.2 m each, and four forces are exerted on the rod, asshown in the figure. Frictional forces are considered to be negligible.Which of the following correctly describes an additional torque that mustbe applied in order to keep the rod from rotating? *F2 = 30 NF, = 20 NF0.2 m→F4 = 20 NF3 = 30 N18 Nm counter-clockwise18 Nm clockwise50 Nm counter-clockwise50 Nm clockwise

The given situation is illustrated below: The torque is:τ→=r→×F→Magnitude:τ=rFsin(θ)If θ=90° is…

Answered: A rod may freely rotate about an axis…

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter10: Fixed-axis Rotation

Section: Chapter Questions

Problem 90P: A uniform cylindrical grinding wheel of mass 50.0 kg and diameter 1.0 m is turned on by an electric...

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Please refernece attachment. See image for more information.

A rod may freely rotate about an axis that is perpendicular to the rod and
is along the plane of the page. The rod is divided into four sections of
equal length of 0.2 m each, and four forces are exerted on the rod, as
shown in the figure. Frictional forces are considered to be negligible.
Which of the following correctly describes an additional torque that must
be applied in order to keep the rod from rotating? *
F2 = 30 N
F, = 20 N
F0.2 m→
F4 = 20 N
F3 = 30 N
18 Nm counter-clockwise
18 Nm clockwise
50 Nm counter-clockwise
50 Nm clockwise

Expert Solution

Fundamentals

The given situation is illustrated below:

The torque is:
$\vec{τ} = \vec{r} \times \vec{F}$
Magnitude:
$τ = r F \sin (θ)$
If $θ = 90 °$ is the angle between the forces and the distance of the force from the axis of rotation, then:
$τ = r F$

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