2.2 Nature of quantities

Question 1

What do vector quantities have?

Answer 1

Both direction and magnitude.

Question 2

What do scalar quantities have?

Answer 2

Magnitude but not direction.

Question 3

What are examples of vector quantities?

Answer 3

Displacement, force, acceleration, velocity, weight, momentum.

Question 4

What are examples of scalar quantities?

Answer 4

Mass, speed, distance, time, temperature, density, energy, volume, power, potential difference.

Question 5

What is the definition of mass?

Answer 5

The matter content of a body.

Question 6

What is the definition of density?

Answer 6

Mass per unit volume.

Question 7

What is the definition of volume?

Answer 7

Three-dimensional space occupied by a body.

Question 8

What is the definition of distance?

Answer 8

Length from one point to another.

Question 9

What is the definition of speed?

Answer 9

Distance travelled per unit time.

Question 10

What is the definition of energy?

Answer 10

Work done.

Question 11

What is the definition of power?

Answer 11

Energy converted or work done per unit time.

Question 12

What is the definition of weight?

Answer 12

Force, acting downwards through a body, due to gravity.

Question 13

What is the definition of pressure?

Answer 13

Force per unit area.

Question 14

What is the definition of displacement?

Answer 14

Distance from a specific point, in a particular direction.

Question 15

What is the definition of velocity?

Answer 15

Displacement per unit time.

Question 16

What is the definition of acceleration?

Answer 16

Change in velocity per unit time.

Question 17

What is the definition of momentum?

Answer 17

Mass x velocity.

Question 18

What are the components of a vector?

Answer 18

The parts of a vector in two perpendicular directions - this process is called resolving the vector.