Grade 10 Physics Unit Test 2

If F is force, k is spring constant and x is extension, Hooke's Law tells us that:

• F=k/x
• x=Fk
• k=Fx
• F=kx

Hooke's Law fails when a material reaches its:

• breakdown
• elastic limit
• end of tether
• fracture stress

_________ is the unit of Spring Constant

• N

• N/m

• m

A stiff material has a:

• high spring constant
• low spring constant
• spring constant of any value
• spring constant which is difficult to predict

If the original length of a spring is 20m and its extended length is 30m. What is the extension?

• 20m

• 12m

• 75m

• 45m

• 10m

A bungee rope has a spring constant of 5N/m. How much a person must weighs in Newton if we want it to extend (stretch) 10m?

• 20N

• 22cm

• 50N

• 50cm

• 21N

Tags

NGSS.HS-PS2-1

What is the spring constant of a bungee rope in N/m if a person weighs 100 N if we want it to extend (stretch) 20m?

• 5N/m

• 5N/cm

• 5N

• 10N

• 10N/m

What is the best description of the relationship shown in this graph?

• In this graph, the relationship between force and extension is linear.

• In this graph, the relationship between force and extension is non-linear.

• In this graph, the relationship between force and extension is directly proportional.

• In this graph, there is no relationship between force and extension.

An unstretched spring becomes longer when a force is applied to it. Which word describes the additional length of the spring gains?

• Expansion

• Extension

• Stretched

Select a logical prediction for the investigation.

• As the force applied to the spring increases, the extension of the spring will decrease.

• As the force applied to the spring increases, the extension of the spring will stay the same

• As the force applied to the spring increases, the extension of the spring will also increase.

Tags

NGSS.MS-PS2-2