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Uniform and Non-Uniform Velocity

To maximize t...

Question

To maximize torque on a lever, which of the following will not help?

A

Apply the force in a direction perpendicular to the lever

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B

Increasing the distance, , from the axis of rotation of the point to which you apply the force

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C

Increasing the magnitude of the force, that we apply

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D

Increasing the density of material

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Solution

The correct option is D
Increasing the density of material

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Similar questions

Q. Which of the following are means of maximizing the torque of a force applied to a rotating object?
I. Maximize the magnitude of the applied force.
II. Apply the force as close as possible to the axis of rotation.
III. Apply the force perpendicular to the displacement vector between the axis of rotation and the point of applied force.

Q. By which of the following ways we can maximise the torque of a force applied to a rotating object?
I. Maximise the magnitude of the applied force.
II. Reduce the distance of a point from the axis of rotation at which force is applied.
III. Apply the force perpendicular to the displacement vector between the axis of rotation and the point of applied force.

Q. Torque, like angular velocity and angular acceleration, is a vector quantity. Most precisely, it is the cross product of the displacement vector,

r

, from the axis of rotation to the point where the force is applied, and the vector for the applied force,

F

T = r \times F

To determine the direction of the torque vector, use the right-hand rule, curling your fingers around from the

r

vector over to the

F

vector. In the example of lifting the lever, the torque would be represented by a vector at

0

pointing out of the page.

A student exerts a force of

50 N

on a lever at a distance

0.4 m

from its axis of rotation. The student pulls at an angle that is

60^{o}

above the lever arm. What is the torque experienced by the lever arm?

Q. The density of a rod gradually decreases from one end to the other. It is pivoted at an end so that it can move about a vertical axis though the pivot. A horizontal force F is applied on the free end in a direction perpendicular to the rod. The quantities, that do not depend on which end of the rod is pivoted, are
(a) angular acceleration
(b) angular velocity when the rod completes one rotation
(c) angular momentum when the rod completes one rotation
(d) torque of the applied force.

Q. The density of a rod AB continuously increases from A to B. Is it easier to set it in rotation by clamping it at A and applying a perpendicular force at B or by clamping it at B and applying the force at A?

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