6.1 Speed

Question 1

What is speed and state its SI units

Answer 1

Speed is the rate of change of distance in respect to time. Its SI unit is km/hr or m/s.

Question 2

What is rate?

Answer 2

Speed is notated as the distance over time as in km/hr or m/s whereas rate is a description of change over time.

Question 3

What is the formula for speed?

Answer 3

Speed = Distance/Time

Question 4

What is the formula for distance?

Answer 4

Distance = Speed x Time

Question 5

What is the formula for time?

Answer 5

Time = Distance/Speed

Question 6

What is the formula for average velocity or average speed?

Answer 6

Average Speed/Velocity = Total Distance/Total Time

Question 7

What is instantaneous speed?

Answer 7

Instantaneous speed is referred to as the speed or velocity at that exact moment of time.

Question 8

Describe the two types of motion.

Answer 8

Motion -
1. Balanced Forces - uniform motion with steady or constant speed
2. Unbalanced forces - non-uniform motion with a change in speed