chapt 1 (physical qunatities)

Question 1

PQ can be classified into? (2) + examples (2 ea)

Answer 1

Scalar (magnitude only)
- distance
- speed

Vector (mag and direction [vector frm gru])
- displacement
- velocity

Question 2

length SI unit (1) and measured using (4)?

Answer 2

SI unit is : m

measured by:
- measuring tape (0.1cm/1mm)
- metre rule (0.1cm/1mm)
- digital calipers (0.001cm/0.01mm)
- digital micrometer screw gauge (0.0001cm/ 0.001mm)

Question 3

time SI unit (1) can be measured by (3) based on (1)?

Answer 3

SI: s

measure by:
- pendulum
- stop watch
- clocks

based on: oscillations