1st Year Physics Unit 1 Measurement.

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Presentation transcript:

1st Year Physics Unit 1 Measurement

Instruments of Measurement Ruler/Meter stick Stop Clock Thermometer Scales Measuring Cylinder Opisometer Trundle wheel Callipers

Basics Units in Physics

Length

Measuring Length.

Using a Ruler/Metre Rule Can you spot any error being made in measuring this wire? Task: Use a ruler/meter rule to measure the length and breath of your copy in millimetres (mm)

Opisometer Task: Use an Opisometer & Ruler to work out the length of a curved line to the nearest cm

Trundle Wheel. Task: Use a Trundle Wheel to measure the length of the corridor to the nearest metre (m)

Vernier Calipers

Callipers Task: Use a callipers or a vernier calipers to measure the outside and inside diameter of a beaker in mm

Mass

Measuring Mass with a Scales Mass is the amount of matter in a substance. Unit: Kilogram (kg).

Task: Calculate the mass of the liquid in a beaker in grams (g)

Temperature

To measure Temperatures. Thermometer Unit: Degrees Celsius (oC) Task: Use Thermometer measure the temperature of a beaker of fresh tap water.

Area & Volume

Area is the amount of surface that covers an object. 52 mm Area = Length x Breadth A = L x B 36 mm A = 52 mm x 36 mm = 1,872 mm2 Task: Measure the length and breadth of your copy and calculate its area in mm2

Volume is the amount of space taken up by an object. Volume = length x breadth x height. Example to calculate the volume of a matchbox V = L x B x H 36 mm 52 mm V = 36mm x 52mm x 15mm 15 mm V = 28,080 mm3 Task: Measure the dimensions of a block of wood (or matchbox) and calculate its volume in mm3

To measure the volume of a liquid Measuring Cylinder Liquid Volume is measured in: Litres (l) or Millilitres (ml)

Read from bottom of the Meniscus

To measure the volume of a small object Finishing Volume Starting Volume The Increase in Volume is 25 ml So this must be the Volume of the Stone

To measure the Volume of an Irregular Object using an Overflow-Can Measuring Cylinder Task: Use an overflow-can and measuring cylinder to work out the volume of a stone in ml