Physics Formula & Definitions Test

What is meant by vector quantity?

• Quantity that has both magnitude and size

• Quantity that has both magnitude and direction

• Quantity that has both magnitude and unit

• Quantity that has direction and unit

A computer can process a signal in 100 ns. What does the prefix 'n' represent?

• nine

• nona

• nano

• nicro

What is meant by velocity?

• distance travelled in a stated direction

• speed travelled per unit time taken

• distance travelled per unit time taken in a stated direction

• speed travelled per unit time taken in a stated direction

Acceleration is defined as ....

• change in speed per unit time taken

• increase in velocity

• decrease in velocity per unit time taken

• change in velocity per unit time taken

Distance travelled can be found from speed-time graph using......?

• gradient of the graph

• area under the graph

• volume under the graph

• slope of the graph

Uniform acceleration is.....

• the increase in velocity per unit time taken

• the constant increase in velocity per unit time taken

• the decrease in velocity per unit time taken

• the constant increase in speed per unit time taken

The object is moving at constant speed, what can you say about the forces?

• Balanced, the forces in opposite direction are equal in size.

• Balanced, the resultant force is equal.

• Unbalanced, the resultant force is zero.

• Unbalanced, one force is greater than the other in opposite direction.

State Newton's 3rd Law of motion:

• Every forces causes a reaction

• No resultant force acting hence no acceleration

• Forces acting on the body always equal and opposite

• To every action there is an equal and opposite reaction.

What is your acceleration as you skydive out of an aeroplane?

• 10 m/s

• 0 m/s

• 0 m/s²

• 10 m/s²

SI unit for mass is....

• gram

• kilogram

• milligram

• killogram