1.1 Physical Quantities and measurement techniques

Question 1

List five apparatus used to measure length

Answer 1

1) Measuring tape
2) Metre rule
3) Ruler
4) Vernier calipers
5) Micrometer screw gauge

Question 2

What is zero error caused by

Answer 2

Zero error is caused by faulty equipment that hasn’t been reset to zero

Question 3

How do you minimize zero error

Answer 3

Calibrate your instrument before use.

Question 4

What is parallax error

Answer 4

The error that occurs due to incorrect positioning of the eyes while taking a reading.

Question 5

Physical quantities can be _________ or ___________

Answer 5

Scalar or vector

Question 6

What is a scaler quantity

Answer 6

One the has magnitude (size) only.

Question 7

What is a vector quantity

Answer 7

One that has both magnitude and direction

Question 8

What are 7 examples of scaler quantities

Answer 8

1) Distance (m)
2) Speed (m/s)
3) Time (s)
4) Mass (kg)
5) Energy (J)
6) Density (kg/m cubed)
7) Temperature (Kelvin)

Question 9

What are 7 examples of vector quantity

Answer 9

1) Displacement (m)
2) Velocity (m/s)
3) Weight and Force (F)
4) Acceleration (m/s squared)
5) Momentum (kg m/s)
6) Electrical field strength (N/C)
7) Gravitational field strength (N/kg)

Question 10

What is a resultant vector

Answer 10

The total or net vector of all vectors combined.