Question

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Dai
pors
7 Mention any two difference between
velocity and speed​

Answer 1

1 Definition  

• Velocity can be defined as the rate at which an object changes position in a certain direction.

• The rate at which an object covers a certain distance is known as speed.

2 Type of quantity  

• Vector quantity

• Scalar quantity

3 Magnitude  

• Velocity can be zero, negative, or positive.

• Speed can never be negative or zero.

4 Change of direction  

• The velocity of the object changes with the change in direction, therefore the object must follow one direction.

• The average speed will continue to count even if the object changes direction.

5 Interrelation  

• An object may possess different velocities but the same speed.

• Speed may or may not be equal to velocity.

6 Unit (SI)  

• Velocity is measured in m/s

• Speed is measured in m/s

7 Equation  

• = ∆x/∆t; where is the average velocity, ‘∆t’ is the time of arrival and ‘∆x’ is the displacement.

• v = d/t; where ‘v’ is the average speed, ‘t’ is time taken to travel the distance and ‘d’ is the distance travelled.

8 Example  

• A train going towards the south direction with an average speed of 50 km/h will have a velocity of 50 km/h, north. An object going straight in a particular direction is considered to have velocity.

• A sports bike travelling at 50 m/s would go from 0 m/s to 30 m/s, before reaching 50 m/s and could even reach 70 m/s. However, the average speed will be the speed of the bike.