Materials

Question 1

How do you find the density of a substance?

Answer 1

Density = mass / volume

Question 2

What is Hooke’s law?

Answer 2

Hooke’s law states that the force required to stretch a spring is directly proportional to the extension of the spring.

Question 3

What does a Force(Tension)-Extension graph look like?

Answer 3

It is a straight line through the origin until the material is stretch passed the limit of proportionality and the line will curve off, becoming flatter as the elastic material has become a plastic material.

Question 4

What does the gradient of a force-extension graph tell us about the material?

Answer 4

The gradient of a material’s force-extension graph tells us the material’s spring constant.

Question 5

What does the spring constant of a material tell us?

Answer 5

The force required to extend the material by 1m.

Question 6

What happens to the spring constant of 2 springs in parallel?

Answer 6

The new spring constant will be the spring constants of both springs added together.

Question 7

What happens to the new spring constant of 2 springs in series with each other?

Answer 7

The new spring constant will be 1 over the addition of each spring constants reciprocal

1/Knew = 1/Kq + 1/Kp