T5 forces and elasticity

Question 1

explain the relationship between the force applied and the extension of an elastic object

Answer 1

the extension is directly proportional to the force applied, provided that the limit of proportionality is not exceeded

Question 2

what is meant by an inelastic (plastic) deformation

Answer 2

• a deformation which results in the object being permanently stretched
• the object doesn’t return to its original shape when the force is removed

Question 3

equation relating force, spring constant and extenstion

Answer 3

force = spring constant x extension

force (N), spring constant (N/m), extension (m)

Question 4

what type of energy is stored in a spring when it is stretched

Answer 4

elastic potential energy

Question 5

what can extension be replaced with in the equation for spring force

Answer 5

compression