Physics Revision: Hookes Law and Young's Modulus

What does Hookes law apply to?

• Anything that can be stretched and then return to its original position

• Anything that can be stretched and not return to its original position

• Anything that can be compressed and then return to its original position

• Anything that can be compressed and not return to its original position

What is the formula for Hookes law?

• F = K/X

• F = K+X

• F = KX

• F = X/K

What is the spring constant also known as?

• Stiffness constant

• Extension constant

• Tensile constant

• Compression constant

What is the point at which the spring or the elastic does not return to its original position called?

• Deformation point

• Elastic limit

• Plastic limit

• Breakage point

What is the unit of stress?

• Newtons per meter squared

• Pascal's

• Kilograms per meter squared

• Pound-force per inch squared

What is the unit of strain?

• Meters

• Kilograms

• No unit

• Newtons

What is Young's modulus measuring?

• Stress applied per unit strain

• Force applied per unit length

• Energy stored per unit volume

• Work done per unit area

What is the formula for Young's modulus?

• Stress/Strain

• Force/Area

• Work/Volume

• Energy/Length

What is the energy contained in the stretched material?

• Twice the stress times the strain

• The stress minus the strain

• The stress plus the strain

• Half the stress times the strain

What is the work done to extend a spring from one point to another?

• F times X

• K times X squared

• F over 2 times X

• K times X