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Let's take a simple example to illustrate the concept.
A pitch is thrown by a pitcher. It starts at zero velocity (in his hand) and reaches a final velocity of 100 mph. Average velocity will be (100 + 0)/2 = 50 mph
Obviously the maximum velocity is 50 X 2 = 100 mph
However this is only true if the initial velocity (or the final velocity for a ball slowing down) is zero.
Wiki User
∙ 12y ago
Wiki User
∙ 11y agoBecause velocity is a measurement of change of speed rather than an average constant speed. To get the average speed (as you rightly said) - you divide the total distance travelled by the time taken. The average velocity is the change in speed over time (either an increase or decrease).
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If the velocity of an object is doubled its kinetic energy is multiplied by?
since kinetic energy is proportional to the square of velocity it is multiplied by 2 x 2 which is 4
Difference between instantaneous and average velocity?
average velocity is the displacement over time while instantaneous velocity refers to the velocity of an object at one point or at as pecific point of time. *displacement is the difference between the initial position and the final position of an object. (distance 2 - distance 1)
How do you get the displacement if the if the final velocity is not given?
Use s=ut+0.5at^2 (^2 notation for squared)Or calculate the final velocity from the known variables (Initial Velocity, Acceleration and Time)v=u+at Where V = Final Velocity, u = Initial Velocity, a = Acceleration, t = TimeThen calculate displacement (s) using s=0.5(u+v)t
What is the 4th equation of motion?
displacement = (final velocity square + initial velocity sq. )/ 2 * acceleration
What is the braking time from 1.5 to 2 seconds what is the final velocity?
The braking time is 2 - 1.5s = 0.5s. The final velocity, if the object comes to a stop, is 0m/s.
If the velocity of an object is doubled its kinetic energy is multiplied by?
since kinetic energy is proportional to the square of velocity it is multiplied by 2 x 2 which is 4
How do you find the time given only the distance and the initial and final velocity?
Average speed = 1/2 (initial speed + final speed) Time = (distance)/(average speed)
The rate of the velocity of an object?
To calculate the velocity of an object you can use the formula v=d/t. v=velocity, d=distance, and t=time. You can also calculate velocity using a=change in v/change in t, v(final)=v(initial)+at, v(average)=v(final)+v(initial)/2, or v(final)^2=v(initial)^2+2ad, or p=mv.
What are a few physics formulas for finding time?
Change in Distace= Initial velocity multiplied by change in time plus half the accleration times change in time squared x=VoT+.5aT^2 Final velocity squared=Intial velocity squared plues two times accleration times change in distance Vf^2=Vo^2+2aX Final velocity= Initial velocity plus accleration times change in time Vf=Vo+aT
Calculate distance from a velocity time graph?
The area between the graph and the x-axis is the distance moved. If the velocity is constant the v vs t graph is a straight horizontal line. The shape of the area under the graph is a rectangle. For constant velocity, distance = V * time. Time is the x-axis and velocity is the y-axis. If the object is accelerating, the velocity is increasing at a constant rate. The graph is a line whose slope equals the acceleration. The shape of the graph is a triangle. The area under the graph is ½ * base * height. The base is time, and the height is the velocity. If the initial velocity is 0, the average velocity is final velocity ÷ 2. Distance = average velocity * time. Distance = (final velocity ÷ 2) * time, time is on the x-axis, and velocity is on the y-axis. (final velocity ÷ 2) * time = ½ time * final velocity ...½ base * height = ½ time * final velocity Area under graph = distance moved Most velocity graphs are horizontal lines or sloping lines.
How do you calculate acceleration from velocity?
There are 3 formula 1. Final velocity = starting velocity + (acceleration)(time) 2. Final velocity^2 = starting velocity^2 + 2(acceleration)(distance) 3. Distance = (starting velocity)(time) + 1/2(acceleration)(time^2) Use whichever you can use.
How do you find displacement when you only have acceleration initial velocity and final velocity?
Kinematics. Final velocity squared = initial velocity squared + 2(gravitational acceleration)(displacement)
What is initial velocity if its less than final velocity?
i think it's 2
How do you find final velocity given height and mass?
the final velocity assuming that the mass is falling and that air resistance can be ignored but it is acceleration not mass that is important (can be gravity) final velocity is = ( (starting velocity)2 x 2 x acceleration x height )0.5
How is KE calculated?
It is calculated as 1/2 mass multiplied by velocity squared
State in words how acceleration is calculated?
There are two methods, it depends on what variables you have: 1. Subtract the initial velocity from the final velocity and divide that whole term by the time (Vf- Vi)/t = a 2. Square both the initial velocity and the final velocity and subtract the squared inital velocity from the squared final velocity and that answer by two times the distance (Vf^2 - Vi^2)/2d = a
Difference between instantaneous and average velocity?
average velocity is the displacement over time while instantaneous velocity refers to the velocity of an object at one point or at as pecific point of time. *displacement is the difference between the initial position and the final position of an object. (distance 2 - distance 1)
