Topic 4B Notes - Forces, Loads & Stresses

Question 1

What do tension forces do to a material?

Answer 1

Stretch a material by pulling its ends apart

Tension forces are one of the basic types of forces acting on materials.

Question 2

What do shear forces do to a material?

Answer 2

Bend or tear a material by pressing different parts in opposite directions

Shear forces can be remembered with the analogy of scissors.

Question 3

What do torsion forces do to a material?

Answer 3

Twist a material by turning the ends in opposite directions

Torsion can be associated with twisting actions.

Question 4

A bending force is a combination of which two forces?

Answer 4

• Tension
• Compression

Bending forces result from the interplay of tension and compression in materials.

Question 5

Shear and torsion forces are also a combination of which two forces?

Answer 5

• Tension
• Compression

Understanding these combinations helps in analyzing material behavior under different loads.

Question 6

In the Forces Exploration activity, what should you do with the marshmallow?

Answer 6

• Squish
• Pull
• Twist

Observations of the marshmallow’s deformation should be recorded after applying these forces.

Question 7

What should you include in the Force Diagram of the marshmallow?

Answer 7

Label as many forces as you can think of

This diagram helps visualize the effects of different forces on the marshmallow.