Hello guys, I hope you all are doing great. In today’s tutorial, we will have a look at Difference Between Velocity and Acceleration. There are 2 most important parameter velocity and acceleration related to the motion of different bodies. The main difference between these two parameters is that velocity changes in the position of a body in a specific direction in unit time. While acceleration is the change in velocity in a specific direction per unit time.
In today’s post, we will have a detailed look at different parameters of velocity and acceleration and find differences. So let’s get started with the Difference Between Velocity and Acceleration.
Difference Between Velocity and Acceleration
Velocity
- The variation in the position of a body in unit time is called velocity.
- Its measuring formula is a meter per second.
- The rate of change in the position of the body with time is called velocity.
- It is equivalent to the body speed feature having direction and movement.
- It mostly used in the science field of kinematics.
- It is a physical term has velocity tan magnitude.
- Its unit is m/s
- The velocity measured between two objects is called relative velocity.
- Its dimension is LT−1
- The moving body has zero value of speed
- A change in velocity called acceleration
- Speed measured at any instant of moving object is called instantaneous speed
- The product of mass and velocity is equal to the momentum.
- Speed is related to the displacement of the body.
- It is also known as a change in displacement of the body.
Calculation of Velocity
Velocity can be measured by dividing the displacement of anybody by the time taken. The formula for calculating velocity is:
- v = s/t
where: v = velocity s = displacement t = time taken
Velocity Definition
Velocity is change in positon with respect of certain time.
What is Speed
- Speed is denoted with V and is the magnitude of variation in the position of anybody and it is a scalar term.
- The time duration in which the distance covered through the body parted in different parts is called average speed.
- The system international unit used for speed is a meter per second. In some cases, kilometers per hour is used
Velocity Dimensions
- Since velocity formula is
- Velocity = Displacement / Time
- V = [LT-1]
Velocity Formula
Difference between Speed and Velocity
- Speed tells about the motion of an object and the quantity of a moving object while velocity tells about the speed quantity and motion of direction.
- Let us take an example car moving with a speed of thirty kilometers per second and its direction is toward south then its speed is given
Tangential Speed
- Tangential speed is caused due to the body moving in a circle.In this case, the direction of motion of the object lies at the tangent to the circle so it is called tangential speed
Acceleration
- The rate of change of velocity is called acceleration.
- The direction of acceleration is found through the total force acting at the body
- The magnitude of the acceleration is explained through the use of the second law of Newton
- Its meauring unit is m/s^2.
- The product of mass and acceleration is equal to the force.
- It is related to the velocity of the body.
Calculation of Acceleration
The formula for the calculation of acceleration is given here.
- a = (v-u)/t
where: a = acceleration v = final velocity u = initial velocity t = time taken
What is Uniform Acceleration
- The acceleration in which the velocity of any moving body varies through equal quantity in given time is called uniform acceleration.
Velocity Vs Acceleration
Velocity
- The change in displacement is called velocity.
- it is a vector that has direction and magnitude.
- Its formula is (d/t)
- It defines how fast the body is moving
- Its measuring unit is meter/second (m/s)
Acceleration
- The change in velocity is called acceleration and it is also a vector
- Its formula is (v/t)
- It defines how fast the velocity of the body varies
- It measuring unit is (m/s2)
How are speed and velocity measured?
- The velocity measuring unit is a meter per second. The commonly measuring units are kilometer per hour and Mile per hour. The formula used for measuring value of velocity is.
V = Δd/Δt = change in distance/change in time
- In simple words, the velocity formula is the ratio between the distance covered and to time taken.
- Velocity and speed both come with the same magnitude but velocity has direction.
Velocity Example: A car is moving towards the east. It has covered 200 kilometers in 5 hours. Calculate its velocity.
Solution:
Distance covered = Δd = 200 km
Amount of time = Δt = 5 hours
Velocity = Δd/Δt = 200/5 = 40 km/h
Types of Velocity
Uniform Velocity
- When body moves and covering same distance in equal time intervals called uniform velocity. Let’s suppose car moving 80 Km/h in 2 hours and cover 160 Km, velocity of car is 80 kilometer per hour.
Non-Uniform Velocity
- If the body covers unequal distance in equal time in a certain direction or direction changing called nonuniform velocity. Nonuniform velocity is also called variable velocity. An example is fan moving at constant speed comes with variable velocity
Average velocity
- Average velocity is change in displacement with respect to time The value of average velocity is positive or negative based on displacement. It measured in meters per second (m/s or ms–1).
Instantaneous Velocity
- The velocity if the body at a certain time instant is called instantaneous velocity. If the body comes with uniform velocity then instantaneous velocity is like standard velocity. The measuring unit is m/s.
v(t) = lim (Δt → 0) [x(t + Δt) – x(t)] / Δt
Constant velocity
- The definition of velocity is the rate of change in position with time and constant velocity means both magnitude and direction of rate with which the body changing position is constant.
Angular velocity
- Angular velocity is the angular displacement of an object per unit time. SI unit of displacement is radian per second (rad/s).It is denoted with (ω, sometimes Ω). Its formula is ω=vr. ω = v r . and the dimensional formula of angular velocity is [M0 L0 T-1].
Final velocity
- The final velocity is also a vector quanity that measures speed and direction of a moving object when it get the highest acceleration
Relative velocity
- The velocity of one object for another object is called relative velocity.
Terminal velocity
- Terminal velocity is done with an object falling freely through gas or liquid.
Escape velocity
- Escape velocity is the minimum velocity value that is needed an object to escape from the orbit of a certain body. This formula is used for measuring value of escape velocity ve=2GMr
Faqs
What is the relationship between speed and acceleration?
- Speed is the distance covered in unit time and acceleration is the rate of change of speed concerning certain direction
What are 5 examples of velocity?
- Earth’s rotation around the Sun,
- Moon’s orbital motion around the Earth.
- The river is moving at a varying speed.
- vehicle’s speed
- Train moving speed
Is velocity can be negative?
- If the body is moving in a positive direction velocity is positive and if the body is moving in a negative direction velocity is negative.
Are velocity and acceleration equal?
- Acceleration is the rate of change in velocity and velocity and displacement also have a relation. Velocity is change displacement. which means acceleration is the second derivative of displacement.
Does velocity cause acceleration?
- If the velocity of the body varies that means the body is in acceleration. Velocity measures both speed and direction. Since the change in velocity can be a change in how fast anybody is moving or changing movement direction.
Is velocity scalar or vector?
- Velocity is a vector quantity and it is defined as displacement in unit time. As velocity is a vector and the direction of velocity is like displacement.
What are the 4 types of velocity?
- Uniform velocity
- variable velocity
- average velocity
- instantaneous velocity
What is the main difference between speed and velocity?
- Speed is defined time rate with which the body is moving in a certain path and velocity is the rate and direction of the body.
- Speed is scalar and velocity is vector.
What are the 4 formulas for velocity?
Variable | Equation |
Velocity | v=u+at |
positive acceleration | s=ut+21at2 |
initial and final velocities | s=21(u+v)t |
Velocity squared | v2=u2+2as |
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That is a detailed post about the difference between velocity and acceleration if you have any queries ask in the comments. Thanks for reading. Have a good day.