GETTING ON WITH ENGLISH IN THE LAB 2n ESO: Hooke´s Law

Robert Hooke was a famous scientist, born in 1635. He most famously discovered the Law of Elasticity (or Hooke’s Law)

Hooke’s Law is a principle of physics that states that the force needed to extend or compress a spring by some distance is proportional to that distance. The law is named after 17th century British physicist Robert Hooke, who sought to demonstrate the relationship between the forces applied to a spring and its elasticity.

This can be expressed mathematically as

                                                     F= kX, 

 F is the force applied to the spring (either in the form of strain or stress)

 X is the displacement of the spring

 k is the spring constant

Objective:

Knowing the existence of Hooke's law, its working and its applications

Observing  graphically how the length of a spring increases in proportion to the force

applied to it.

Determining  the elastic constant of a spring.

Material:

A dynamometer

A balance and a rule

Procedure:

1.       Prepare a clamp stand with a ruler

2.       Put he dynamometer

3.       Calculate the weight  of an empty pencil case

4.       Put different objects inside the case of 100g , 200g, 300g …. and read their weight

5.       Make a table like this:

Mass (g)
Length (cm)

6.       Make a graph  (mass:x axis and length : y axis)

7 Calculate  the  spring  constant for every  measure

                  

                                               F=    Kx