1.1, 1.2, 1.3 - Numbers and units

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SI units = Basic units for measuring mass, time and length [Kg, s, m]

All other units are formed using this [Speed, force, energy etc.]

How To Measure :

VERY OBVIOUS NO NEED TO STUDY

Measurement - Zero Error = Corrected Measurement

Zero Error = Type of error in which an instrument gives a reading when the true reading at that time is zero

Average Value For Small Distance -

  1. Measure multiples
  2. Divide

Eg. Measure the time taken for a pendulum to oscillate 5 times, and divide that record by 5

Scalar Quantity - Magnitude only - Distance, speed, time, mass, energy and temperature

Vector Quantity - Magnitude and Direction - Force, weight, velocity, acceleration, momentum, electric field strength and gravitational field strength

1.6 - More about mass and density

Mass = Measure of the quantity of matter in an object at rest relative to the observer