Elasticity

An example of a perfectly plastic body is ___________

• Quartz

• Putty

• Crystal

• Rubber

When too many people stand on a bridge it collapses, why?

• Due to increase in stress

• Due to improper construction

• Due to overweight

• Due to friction

Tags

NGSS.HS-PS2-1

What happens when the stress applied to the body is increased beyond the maximum value and is removed after some time?

• The body will come back to its original position

• The body will oppose the stress

• The body cannot return to its original position

• The body becomes hot

Air is more elastic than water.

• True

• False

At the neutral axis, bending stress is _____

• Minimum

• Maximum

• Zero

• Constant

In simple bending, ______ is constant.

• Shear force

• Loading

• Deformation

• Bending moment

When a beam is subjected to simple bending, ____________ is the same in both tension and compression for the material.

• Modulus of rigidity

• Modulus of elasticity

• Poisson’s ratio

• Modulus of section

The stress is directly proportional to _______

• E

• u

• y

• R

A compressed spring in a toy is used to launch a 5.00-gram ball. If the ball leaves the toy with an initial horizontal speed of 5.00 meters per second, the minimum amount of potential energy stored in the compressed spring was 

• 0.0125 J 
• 0.0250 J 
• 0.0625 J 
• 0.125 J 

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-1

A 10-newton force is required to hold a stretched spring 0.20 meter from its rest position. What is the potential energy stored in the stretched spring?

• 1 J
• 2 J
• 5 J
• 50 J

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-1