Hookes Law

At point P, _______.

• the force applied to the spring is equal to its elongation

• Hooke's Law ceases to be valid

• the spring is can be stretched but still springs back into shape reversibly

• the spring constant increases

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

Tags

CCSS.8.EE.C.7B

Hooke's Law fails when a material reaches its:

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

A graph of extension against force for an elastic material is:

• A downward curve
• An upward curve
• A straight line from any point on the x and y axis
• A straight line from the origin

Tags

CCSS.8.EE.B.5

A stiff material has a:

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

A force of 400 N is applied to stretch a spring which has a spring constant, k=100 N/m. How much does the spring stretch past its free length ( extend)?

• 0.4 m

• 2.34 m

• 4 m

• 5.17 m

A force of F=500 N is applied to extend a spring. What is the extension x of the spring if its spring constant is k= 500 N/m?

• 0.1 m

• 1 m

• 1000 m

• 100m

_________ is the unit of Spring Constant

• N

• N/m

• m

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

• 20m

• 12m

• 75m

• 45m

• 10m

Tags

NGSS.MS-PS3-2

Hooke's Law describes the behaviour of which kind of material under tension?

• plastic
• metals only
• elastic
• non-metals only