A21 - 11F Forces & Elasticity

How can we change the shape of an objet?

• bending

• stretching

• compressing

• all three

A spring, which has a spring constant of 10 N/m, has been stretched 2 m. What is the potential energy now stored in the spring?

(a)  

Which word describes an object that will return to its original shape when forces are removed?

• elastic

• inelastic

Which word describes an object that will not return to its original shape when forces are removed?

• elastic

• inelastic

What is the name of the energy stored in a stretched bow and arrow

• kinetic energy

• gravitational potential

• elastic potential

• inelastic potential

A spring with a constant of 3N/m is compressed by 0.5m. Calculate the force.

• 150

• 1.5

• 6

• 0.375

What happens to an elastic object past the limit of proportionality proportionality

• force and extension are proportional

• it returns to its original original

• force and extension are no longer proportional

A student investigated how the extension of a spring depends on the force applied to the spring. To find the extension________ the length of the spring with 0N weight from each reading

• add

• subtract

• multiple

• divide