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Internal Forces and Sign Conventions

Internal Forces and Sign Conventions

Assessment

Interactive Video

Physics

10th - 12th Grade

Hard

Created by

Thomas White

FREE Resource

The video tutorial introduces internal forces in beams, focusing on bending moments, normal forces, and shear forces. It explains how these forces are identified and calculated, using the positive sign convention. An example problem is solved to demonstrate the application of these concepts in practice.

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8 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary focus of the lesson on internal forces?

Design of beam structures

External forces on beams

Material properties of beams

Introduction to internal forces

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which internal force is represented by the letter 'M'?

Bending moment

Torsional force

Normal force

Shear force

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does a normal force do to a beam?

Acts parallel to the cut

Causes twisting

Acts perpendicular to the cut

Causes bending

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the international sign for scissors related to?

Torsional force

Normal force

Bending moment

Shear force

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of the positive sign convention?

To differentiate between different types of forces

To simplify calculations

To standardize the direction of internal forces

To ensure forces are always positive

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in solving problems using the method of sections?

Determine the shear force

Identify the type of beam

Find global equilibrium

Calculate the bending moment

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the problem-solving example, what is the value of the reaction force B_Y?

113.2 pounds

136.8 pounds

150 pounds

200 pounds

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