Experimental Determination of Young's Modulus

Question 1

What is stress?

Answer 1

Force / Area, force per unit area

Question 2

What is the strain?

Answer 2

Extension / Original length of wire

Question 3

What is the Young’s Modulus?

Answer 3

Stress / Stain, is a measure of the sitffness of the material

Question 4

How do we measure the area of a wire?

Answer 4

Measure the diameter 3 times in 3 different places to ensure the it is circular

Question 5

When performing an experiment to calculate the Young’s Modulus of a material, what do we want L to be?

Answer 5

As large as possible, >2m

Question 6

What safety precautions should we take when experimentally calculating the Young’s Modulus?

Answer 6

Wear safety goggles for when the wire snaps. Cushion the weight for when it falls so it doesn’t hurt anyone’s feet

Question 7

What device do we use to measure the diameter of a wire?

Answer 7

A micrometer

Question 8

When experimentally determining Young’s Modulus of a material, what is the force equal to?

Answer 8

mg, m being the mass of the weight

Question 9

What is L?

Answer 9

The distance to the tape

Question 10

How do we measure the extension of the wire?

Answer 10

Using a ruler