Springs

Question 1

What does Hooke’s Law state?

Answer 1

the force need to stetch a spring is directly propotional to the extension of the spring from its natural length F = K ΔL

up to the limit of proportionality

Question 2

What is K?

Answer 2

the spring constant aka the stiffness constant

the greater the K the stiffer the spring is

measured in N m^-1

Question 3

What is the elastic limit?

Answer 3

if a spring is stretched beyond its elastic limit, it does not regain its initial length when the force applied to it is removed

Question 4

What does the weight of spring in parallel equal?

Answer 4

W = F₁ + F₂ = K₁ΔL + K₂ΔL = KΔL

Question 5

What is the equation for total extension of two springs in series?

Answer 5

ΔL = ΔL₁ + ΔL₂ = W / K₁ + W / K₂ = W / K

Question 6

What is the effective spring constant for two springs in parallel?

Answer 6

K = K₁ + K₂

Question 7

What is the effective spring constant for springs in series?

Answer 7

1 / K = 1 / K₁ + 1 / K₂

Question 8

What is the equation for the elastic potential energy stored in a stretched spring?

Answer 8

EP = 1/2 F ΔL = 1/2 K ΔL²