velocity grade -8

• Science
• Secondary Education

Velocity 

Grade-9

Science 

Sept 27, 2020

INSTRUCTIONS 

1. Mute your mics, do not on unless instructed 

2. Maintain the decorum of online classes

3.Raise your hands/ call your names before talking 

4. Write your names in chat section 

From the video 

1. What is speed?

2. What is velocity?

Is this speed or velocity? Why?

Is this speed or velocity? Why?

VELOCITY 

Velocity is the speed and direction of an object's motion 

Velocity is shown by arrow 

length of the arrow represents the speed and arrow points in the direction 

Analyze the figure 

Analyse this image.

Analyse the arrows 

Interpret- What are the possibilities in which this cyclist can change his velocity?

Constant and changing velocity 

Velocity is constant, or does not change when an object's speed and direction of movement do not change.

velocity is changing when any of the quantity either speed or direction changes 

1. When speed changes
2. when direction changes
3. when both changes 

What is the velocity of this car?

1. 0
2. 2
3. 1
4. 3

In which image is the speed and direction both changing

1. A
2. B
3. C
4. none of these

Which arrows represent constant velocity?

1. walking
2. skateboarding
3. both
4. none of these

Challenge- Do you think the formula used to calculate speed and velocity the same

Bob rides his bicycle on a bike path that is 75 kilometres long to get to his house that is due east of the bike
path. If it takes Bob 15 hours then what is the velocity?

1. 5 km /hr
2. 5 km /hr East
3. 1500 km/hr
4. 1500 km /hr East

Access the word file 

Analyze the graph carefully and answer the follow up questions 

write any two words you learnt today