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Equilibrium and Torque Concepts

Equilibrium and Torque Concepts

Assessment

Interactive Video

Physics

9th - 10th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial introduces the concept of rotational equilibrium, explaining that in addition to the sum of forces in the X and Y directions being zero, the sum of torques must also be zero for an object to be in total equilibrium. The tutorial discusses the conditions for rotational equilibrium, emphasizing the importance of balancing torques. It also explains the convention of choosing positive and negative directions for torques. An example problem involving a window washer on scaffolding is presented to illustrate these concepts.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main difference between regular equilibrium and rotational equilibrium?

Rotational equilibrium does not involve any forces.

Regular equilibrium is only about vertical forces.

Regular equilibrium involves torques, while rotational equilibrium involves forces.

Regular equilibrium involves forces, while rotational equilibrium involves torques.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In equilibrium, what must the sum of forces in the X and Y directions equal?

Negative one

One

Zero

Infinity

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does it mean when the sum of torques in each direction is zero?

The object is only moving vertically.

The object is neither moving nor rotating.

The object is rotating but not moving.

The object is moving but not rotating.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the condition for rotational equilibrium?

The sum of torques must equal zero.

The sum of forces must be less than zero.

The sum of torques must be greater than zero.

The sum of forces must be greater than zero.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is positive torque typically defined?

Downward direction

Clockwise direction

Counterclockwise direction

Upward direction

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the customary practice for defining negative torque?

Clockwise direction

Downward direction

Counterclockwise direction

Upward direction

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the context of torques, what is similar to choosing positive and negative directions in forces?

Choosing the direction of rotation

Choosing the speed of rotation

Choosing the length of the lever arm

Choosing the mass of the object

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