write any four differences between speed and velocity
Answers
Answer:
Velocity Speed
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.
Answer:
Hope it's help you
Explanation:
Speed :
(i) Speed is defined as the distance travelled by the body per unit time
(ii) Speed =
timetaken
distancetravelled
(iii) Speed is always positive
Velocity :
(i) Velocity of a moving body is defined as is rate of change of its position with time in a particular direction
(ii) Velocity =
timetaken
displacement
(iii) Velocity is a vector quantity
(iv) Velocity can be negative