Young Modulus

Question 1

What do we do basically

Answer 1

Stretch a wire over a table, clamp it
Then add masses over a pulley to extend

Measure extension for different forces,

Rearrange to find young modulus

Question 2

What kind of pulley should you use

Answer 2

Smooth pulley, such that no work is done against it

Question 3

Why do you use a control?

Answer 3

Use a control so you always can compare against ORIGINAL LENGTH ,

2) also if anything happen to temp and wire changes, wire will change to both , but relative extension is constsnt

Question 4

How to measure the diameter of micrometer for area? Accuratllry

Answer 4

Use a MICROMETER (0.01 mm) and measure diameter across length, take average for diameter

Question 5

How to measure extension ?

Answer 5

Vernier calliper ( 0.1mm)

Question 6

How to reduce uncertainty (what to do with lengths and area)

Answer 6

Make length as much as possible, reduce

Greatest uncertainty probably in extension, so reduce area the most to make it extend the most and reduce uncertisnty

Question 7

Safety

Answer 7

Google as might snap

Cushion as might fsll

Question 8

How to measure orignal length?

Answer 8

Add one mass to make it taught , but then measure extension beyond this , so calibrate vernier back to 0

Question 9

How to read vernier?

Answer 9

See where 0 links up with that’s the mm scale

Then see where the first line matches the scales and count the division to there

Question 10

Must take values from linear part

Answer 10

Don’t lack, nkt sgter limit of propeotiksmoutn