Speed

Question 1

What is speed?

Answer 1

The speed of an object how fast or slow the object is moving. It is the distance moved by the object per unit time.

Question 2

Define speed.

Answer 2

Speed is defined as the rate of change of distance.

Question 3

What are the common unites for speed?

Answer 3

Meters per second

Kilometers per hour

Question 4

How is AVERAGE speed calculated?

Answer 4

Total distanced travelled / Total time taken

Question 5

What should we note for average speed?

Answer 5

Average speed does not refer to the car’s speed throughout the journey. Therefore, when we say that a car is traveling at an average speed of 40km/h, it does not mean the car has a speed of 40km/h throughout the journey.

Question 6

What is instantaneous velocity?

Answer 6

The speed at any instant is known as the instantaneous speed and it may vary considerably from the average speed.

Question 7

What does a speedometer do in car?

Answer 7

The instantaneous speed of the car.

Question 8

In many cases objects do not move at a ____ (the same) speed for the entire motion being investigated. In such cases the average speed is calculated as opposed to simply the speed.

Answer 8

Constant