1.1 Basic Physics

Question 1

What is the word given to an equation where the units for both side are the same?

Answer 1

Homogeneous

Question 2

What is a scalar?

Answer 2

A quantity that has magnitude only

Question 3

What is a vector

Answer 3

A quantity that has magnitude and direction

Question 4

What is the centre of gravity

Answer 4

The centre of gravity is the single point within a body at which the entire weight of the body may be considered to act

Question 5

What is the principle of moments?

Answer 5

For a system to be in equilibrium, ∑ anticlockwise moments about a point = ∑ clockwise moments about the same point

Question 6

What is the absolute uncertainty?

Answer 6

The margin of error for any measuring equipment (±) that tells us a range/ percentage of where the result could lie