Physical Quantities And Measurements Flashcards
What is the accuracy of a metre rule
(10-100 cm) (0.1 cm)
What is the accuracy of a vernier caliper
1-10 cm (0.001 cm)
What is the accuracy of a micrometer screwgauge
Less than 2 cm (0.0001 cm)
What is a physical quantity
Any quality that has a numerical value and unit
What is a scaler quantity
Physical quantities which only have magnitude or size
What is a vector quantity
Physical quantities which have both magnitude and direction
What is the formula for speed
S=d/t
What is the formula for acceleration
A=v-u/t
What is random error
When repeated measurements of quantity yield different results under the same conditions
What is systematic error
When all physical quantity measurements are affected equally and produce consistent differences in readings
What is the Vernier caliper made up of
A main scale and a vernier scale
How is the reading on a vernier caliper obtained
Reading=main scale+ (Vernier scale*0.001)
What size object can the Vernier caliper measure
15 cm
What size object can the micrometre screwgauge measure
5 cm
What is the micrometre screwgauge made up of
A main scale and a thimble scale
