PHYSICS 1010 Tutorial #1 Solutions
In its investigations, Physics uses physical quantities (length, mass, time, force, power, work, etc). All
these physical quantities are classified in:
length, mass, time.
(quantities that can be expressed as a combination of fundamental quantities):
speed, acceleration, force, power, work, etc.
1.1 Standards of Length, Mass, and Time
Length, mass, and time are fundamental physical quantities. Their units are fundamental units in S.I.=
Systeme International (French) of units: meter, kilogram, second.
Complete the following table:
Practice 1.1.2: Conversions
(use the table below):
7 nm =
20 MV = 2.0×10
0.9 GW = 9×10
1 h =
60 min = 3600 s
1.3 Dimensional analysis
– is a powerful method used when we want to determine if an expression has
the correct form
Physical quantities can be added or subtracted only if they have the same dimensions.
The terms on both sides of an equation must have the same dimensions.