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How do you find deceleration when you do not know final velocity?
Wiki User
∙ 10y ago
You must use what you DO know, along with an appropriate equation or formula
from the toolbox of formulas you've collected during your study of Physics.
Example:
If you know the total distance covered and the elapsed time,
then you can use the familiar formula ...
x = 1/2 A T2
but solve it for 'A' (acceleration):
2x = A T2
A = 2x/T2 .
Wiki User
∙ 10y ago
Wiki User
∙ 12y agoDeceleration is found in the same way as forward acceleration: a=Δv/Δt
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How do you find the distance given only the initial velocity traveled time and final velocity?
You can only know the distance for sure if acceleration or deceleration is constant. Add the start and end velocities and divide by two and then multiply by the time to get your distance.
How can you find final position without knowing initial velocity?
Without knowing initial velocity ? Hmmm. That could make it difficult.Our best advice would be to use what you do know to find what you're looking for.
How do you find the initial velocity just with the accelaration final velocity and time?
To find acceleration, you take Vi [Initial Velocity] and you subtract if from Vf [Final Velocity.] (Vi - Vf) If they Vi and Vf are already given, you take the two givens and you subtract them from each other. Vi minus Vf. Do not do Vf minus Vi or it will be wrong. After you do that, you divide your answer from T [Time] (Vi - Vf) a= _____ t Once you get your answer, that will be your acceleration.
How do you find distance when given initial velocity final velocity and acceleration?
Here are the velocity equations D= (vi+vf/2)t D=vit + 1/2 at^2 V^2=Vi^2 + 2ad V= vi+at a= (vf-vo)/t According to your question, use V^2=Vi^2 + 2ad v= Final velocity vi= initial velocity a= acceleration d= displacement
If at the Earth's surface a projectile is launched straight up at a speed of 9 km per sec to what height will it rise Ignore air resistance and the rotation of the Earth?
9 km/s = 9000m/s Gravity decreases the velocity of the object by 9.8 m/s each second. The velocity at the top is 0 m/s Equation 1: Velocity final = velocity initial - (9.8 m/s × time) Final velocity =0 m/s Initial velocity = 9000m/s 0 = 9000 - 9.8 t 9.8 t = 9000 t = 9000÷ 9.8 t = 918 seconds Average velocity = (9000 + 0 ) ÷ 2 =4500 m/s Height = average velocity × time Height = 4500 m/s ×918 seconds=4,131,000 meters = 4,131 Km. If you do not want to round, this equation will find the answer more accurately. (velocity final) 2 - (velocity initial) 2 = 2 × acceleration × distance m/s2 0 - 90002 = 2 × 9.8 × d d = 4,132,653.061 meters = 4,132.653061Km I do not know of any measuring tool that measures that precisely!
A braking time of 1.5 to 2 seconds what is the final velocity?
You need more details.The final velocity could be 0However, you need to know the initial velocity, and the braking acceleration, and perhaps other acceleration/deceleration factors to know the true answer.
How do you find the distance given only the initial velocity traveled time and final velocity?
You can only know the distance for sure if acceleration or deceleration is constant. Add the start and end velocities and divide by two and then multiply by the time to get your distance.
How do you find a final velocity without distance but given time?
Without distance, you have to know time, initial velocity, and acceleration, in order to find final velocity.
What is the formula for calculating final velocity when you know the initial speed and the acceleration?
the formula for finding acceleration is final velocity, minus initial velocity, all over time. So if you have the acceleration and initial speed, which is equal to the initial velocity, you must also have time in order to find the final velocity. Once you have the time, you multiply it by the acceleration. That product gives you the difference of the final velocity and initial velocity, so then you just add the initial velocity to the product to find the final velocity.
How do you find initial velocity if final velocity or distance is not present?
you cannot. you need to know one or the other if you're doing a problem where someone is throwing something in the air, the final velocity is 0
How do you find final and initial velocities with the average velocity?
You can't.You only know what half the sum of (initial + final) is, (it's the average), but you don't know what the initial and final are.
What would you use to find the acceleration?
The answer depends on the context: You can find the acceleration if you know any three of : initial velocity, final velocity, time, distance travelled. You can find it if you know the mass and force. You know the two masses and the distance between them (gravitational acceleration).
How do you find final and initial velocity?
You use the information you're given, along with the equations and formulas you know that express some kind of relationship between the information you're given and the initial and final velocity.
How do you find the initial velocity just with final velocity displacement and time?
i only know the equation d=1/2(Vi+Vf)t but i don't know how to Rearrange it to start with "Vi ="
What equation would you use to find the acceleration of an object of known mass if you also know the initial velocity final velocity and time over which the acceleration occured?
Use the equation a=(v-u)/t, whereby v stands for final velocity, u for initial velocity and t for time.
How can you find final position without knowing initial velocity?
Without knowing initial velocity ? Hmmm. That could make it difficult.Our best advice would be to use what you do know to find what you're looking for.
How do you find the initial velocity just with the accelaration final velocity and time?
To find acceleration, you take Vi [Initial Velocity] and you subtract if from Vf [Final Velocity.] (Vi - Vf) If they Vi and Vf are already given, you take the two givens and you subtract them from each other. Vi minus Vf. Do not do Vf minus Vi or it will be wrong. After you do that, you divide your answer from T [Time] (Vi - Vf) a= _____ t Once you get your answer, that will be your acceleration.
