Group 2 - Measuring Instruments by Nada Batrisyia, Bettina and Nur Iffah

LENGTH

Conversions between various units of length:

- 1km = 1000m

- 1m = 100cm

- 1cm = 10mm

- 1mm = 1/10cm


- The SI Unit for length is metres.

- These are some of the items to measure length
-Vernier Calipers
  Metre rule

  Measuring Tape

VERNIER CALIPERS

 

- Vernier Calipers are used to measure short lengths and diameters of objects of up to 10cm.

- Vernier calipers give a more accurate result than a metre rule.

ACCURACY OF VERNIER CALIPERS?

- 0.01cm

How to use the vernier calipers?

- Step 1: Close the jaws of the vernier calipers.

-Step 2: Check for any zero error.

- Step 4: Place the object that you want to measure within the jaws of the vernier calipers.

- Step 5: Read the measurement.

METRE RULE

 

- Metre rule is used to measure the length of an object simply by placing one end of the object against the other end of the object.

ACCURACY OF METRE RULE?

- 0.1cm

MEASURING TAPE

 

- Measuring tape is used to measure lengths which are greater than 1 metre in length.

- Some measuring tapes can be as long as 60 metres long.

ACCURACY OF MEASURING TAPE?

- 0.1cm

How to use it?

- Step 1: Pull the tape out of its case.

- Step 2: Note the markings on the tape.

- Step 3: Check the last markings in which your tape stops at.

- Step 4: That will be your final answer.

ERRORS IN MEASUREMENTS

-Parallax error

Parallax error means the eye not being in the correct positions when taking reading.

You should place your eye vertically above the marking.

Thank you for reading the above items!