1.2 S and V, Forces

Question 1

What is the definition of a scalar?

Answer 1

A quantity that only has magnitude.

Question 2

What is the definition of a vector?

Answer 2

A quantity that has magnitude and direction.

Question 3

What are examples of scalar quantities?

Answer 3

Distance, speed, rate of change of speed, temperature, time, mass, power, energy and resistance.

Question 4

What are examples of vector quantities?

Answer 4

Velocity, displacement, acceleration, force, moments and current.

Question 5

What are the conditions for equilibrium?

Answer 5

• The vector sum of the vertical forces is 0.
• The vector sum of the horizontal forces is 0.