The term speed and Velocity gives a sense of understanding of an object and how rapid or slow it is moving. We encounter a situation where we must judge which object is moving rapidly or slowly. It becomes easy to say when the object is heading in the same direction. However, the case of judging becomes tough when the direction of motion is in the opposite direction. To overcome this situation, the idea of Velocity helps a lot.
Velocity is the rate of change of the object's position concerning a frame of reference and time. The definition might seem complex, but Velocity is understood as speeding in a specific direction for a common purpose. The Velocity has been categorized as the vector quantity. Those quantities with direction and magnitude (speed) are being said as Velocity. It is referred to as an accelerating body if there is variation in the Velocity or the direction.
The Velocity has SI unit = meter per second
Initial and Final Velocity
The initial Velocity shows that when a body travels when gravity exerts a force on the body. The final Velocity determines the direction and speed of the traveling object when it achieves maximum Acceleration.
Methods to Determine the Final Velocity
Determination of final Velocity is easy and needs a basic concept with little concept of physics.
Add the quantity that resulted from steps 1 and Step 2 to determine the final Velocity. Let's say the initial Velocity was 4 m/s, your body acceleration was 3 m/s, your object acceleration was 4 m/s, and the final Velocity was 7 m/s.
It is the simplest form of motion. We observe constant motion when a body slides on a horizontal and low-friction surface.
The above graph represents displacement versus time, and an object travels uniformly. The straight line which has emerged can be expressed algebraically:
x= x0 + vt
In the equation,
X not = displacement at a time t
T = time t
V = Constant Velocity of the object
Unit of the Velocity
m/s = SI unit of the Velocity
Dimension = L/T
Relation between Speed and Velocity
Speed and Velocity are not similar, and they are confusing to the students. Differences exist between the speed and the Velocity. Speeds only indicate how the object/ body is moving, but the Velocity, along with speed, also indicates the direction of the body traveling. Speed is termed as the function of the distance covered/travelled, and Velocity is termed as the function of displacement.
Examples of Velocity
Question: Ritik goes to the office in the government's car every evening. His office is 8 km from his residence, and he takes 15 mins to travel, but when he sees the speedometer of the car. It shows ununiform reading always. So how will he know the actual Velocity?
Answer: The average Velocity of the Ritik vehicle can be determined by:
For the understanding, let us assume that the car is travelling in a straight path and will change the time units to hours.
15 mins = 0.25 hrs
We know the formula for the determination of average Velocity
= 8 kilo meter/ 0.25 hrs
= 32 kilometers/hr
We can observe that the car may change its speed; it travels an equal amount of distance in the same amount of time, but the average Velocity will remain constant.
Dissimilarities Between Speed and Velocity
Relation Between the Velocity and the Acceleration
Frequently Asked Questions
Question: Can we add the vectors algebraically?
Answer: Addition of the vector is impossible because they have the directions along with the magnitude. The sum cannot be performed on the directions algebraically.
Question: Define the instantaneous speed.
Answer: The speed of the object at a particular moment is called Instantaneous speed.
Question: Determine the Acceleration and Velocity of the round object when it is thrown in the air.
Answer: The Acceleration and Velocity of the object will increase if it is thrown in the air.
Question: A bullock cart has covered a 100 m path in 10 seconds. Determine the Velocity of the object.
Answer: We know that
Distance covered: 100 meters
Time: 10 seconds
Velocity = Displacement/ time
= 100/ 10
= 10 m/s
The Velocity of the bullock cart is ten m/s.
Question: A horse is moving towards the north at the Velocity of 5m/s, and it has taken 200 seconds to reach its destination. Determine the path covered by the horse.
Answer: We have been asked to find displacement.
The quantities given to us are
The Velocity of the horse = 5m/s
Time is taken by the horse = 200 m/s
We know the formula of the Velocity,
Velocity = Displacement/ Time
Velocity x time = Displacement
5 x 200 = 1000 m.
The distance covered by the horse is 1000 meters.
Question: Ram goes to school with a velocity of 4 m/s, and the distance between the school and his home is 400m. Determine how much Ram will take to reach the school.
Answer: The given quantities are:
Velocity of the Ram = 4 m/s
Displacement = 400m
We know the formula
Velocity = Displacement / Time
Time = Displacement/ Velocity
Time = 400 / 4
Time = 100 sec.
The time taken by the Ram is 100 seconds.
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