Basic physics

Question 1

What are the 6 base units?

Answer 1

Kilograms (Kg), Meter (M), Seconds (s), Ampere (A), Kelvin (K), Moles (mol)

Question 2

What is homogeneity of units?

Answer 2

Two quantites which can be expressed in the same base units

Question 3

What is the difference between scalar and vector quantities?

Answer 3

Scalar - has a magnitude but no direction
Vector - has a magnitude and a direction

Question 4

What is a moment and what is the principle of moments?

Answer 4

Moment - the turning effect of a force
Principle of moments - for an object in equilibrium the sum of the clockwise moments is equal to the sum of the anticlockwise moments.

Question 5

What is the centre of gravity of an object?

Answer 5

Point at which the entire weight of an object is considered to act.

Question 6

What is the centre of mass of an object?

Answer 6

Point through which a single force on the body has no turning effect