Cheap Wholesale NFL Jerseys - How to Calculate Acceleration

By Steven Holzner

In physics terms, acceleration, a, is the amount by which your velocity changes in a given amount of time. Given the initial and final velocities, vi and vf, and the initial and final times over which your speed changes, ti and tf, you can write the equation like this:


acceleration formula

In terms of units, the equation looks like this:

acceleration formula by units

Distance per time squared? Don’t let that throw you. You end up with time squared in the denominator because you divide velocity by time. In other words, acceleration is the rate at which your velocity changes, because rates have time in the denominator. For acceleration, you see units of meters per second2, centimeters per second2, miles per second2, feet per second2, or even kilometers per hour2.

It may be easier, for a given problem, to use units such as mph/s (miles per hour per second). This would be useful if the velocity in question had a magnitude of something like several miles per hour that changed typically over a number of seconds.

Say you become a drag racer in order to analyze your acceleration down the dragway. After a test race, you know the distance you went — 402 meters, or about 0.25 miles (the magnitude of your displacement) — and you know the time it took — 5.5 seconds. So what was your acceleration as you blasted down the track?

Well, you can relate displacement, acceleration, and time as follows:


and that’s what you want — you always work the algebra so that you end up relating all the quantities you know to the one quantity you don’t know. In this case, you have


(Keep in mind that in this case, your initial velocity is 0 — you’re not allowed to take a running start at the drag race!) You can rearrange this equation with a little algebra to solve for acceleration; just divide both sides by t2 and multiply by 2 to get


Great. Plugging in the numbers, you get the following:


Okay, the acceleration is approximately 27 meters per second2. What’s that in more understandable terms? The acceleration due to gravity, g, is 9.8 meters per second2, so this is about 2.7 g’s — you’d feel yourself pushed back into your seat with a force about 2.7 times your own weight.

                                      1. 4746501967 2018-02-25
                                      2. 5211931966 2018-02-25
                                      3. 5936601965 2018-02-25
                                      4. 9856451964 2018-02-25
                                      5. 5824971963 2018-02-25
                                      6. 6308961962 2018-02-25
                                      7. 3055971961 2018-02-25
                                      8. 7451961960 2018-02-25
                                      9. 2458921959 2018-02-25
                                      10. 1955001958 2018-02-25
                                      11. 6433701957 2018-02-25
                                      12. 744321956 2018-02-25
                                      13. 3545931955 2018-02-24
                                      14. 4244531954 2018-02-24
                                      15. 7574311953 2018-02-24
                                      16. 5343791952 2018-02-24
                                      17. 3464581951 2018-02-24
                                      18. 5317271950 2018-02-24
                                      19. 7054671949 2018-02-24
                                      20. 2122831948 2018-02-24
                                      21. cheap jerseys | wholesale jerseys |