forces - forces and elasticity

Question 1

examples of elastic materials

Answer 1

slinky, rubber bands, rubber gloves, eraser

Question 2

what causes an elastic material to stretch?

Answer 2

the equal magnitude and opposite distance of forces cause an object to stretch. when forces are released, the elastic object returns back to its original length

Question 3

Elastic materials will always return….

Answer 3

to their original length or shape if we take away the forces acting on them

Question 4

what are squeezing forces/compression on elastic material?

Answer 4

same magnitude but same direction. if we take away forces it will return to original length

Question 5

what happens when we apply 3 forces on elastic material?

Answer 5

object will bend but once forces removed it will return to original shape and length. these changes are called elastic deformation

Question 6

what needs to be applied in order to change an object’s shape or length?

Answer 6

more than one force as if only one force applied to stationary object, then the forces are no longer balanced. it would then move

Question 7

what happens when we stretch in elastic materials?

Answer 7

they do not return to their original length when the forces are removed
eg. certain polymers
these are called inelastic deformation

Question 8

force equation on elastic objects

Answer 8

sprint constant (N/m) x extension (m)

Question 9

force equation on compression

Answer 9

F = k x e
this time e stands for compression instead of extension

Question 10

what is used when we stretch or compress an elastic object

Answer 10

a force to do work. in this case, elastic potential energy is stored in the object

Question 11

work =

Answer 11

work done = elastic potential energy
only true if object is not inelastically deformed