| What is Acceleration? | This is how quickly the velocity is changing. |
| What can the change in velocity be? | It can be Speed or Direction. |
| What is the formula for Acceleration? [Non-Uniform] | Acceleration [m/s²] = Change in Velocity [m/s]
---------[Divide]-----------
Time [s] |
| Rearrange the formula for Time. | Time [s] = Change in Velocity [m/s]
----------[Divide]-----------
Acceleration [m/s²] |
| Example of Acceleration. | Bob is in a race. He goes from 6 [m/s ] to 12 [m/s] in 2 minutes.
First Check the units. 2 minutes = 120 seconds.
Now do the change in velocity [12-6=6 [m/s]
Now do the formula. 6
---- = 0.05 m/s²
120 |
| How to find out Change in Velocity? | You just do the Final velocity - Initial Velocity |
| What is Uniform Acceleration? | This is when an object/animal travels with a constant acceleration |
| What is the Formula for Uniform Acceleration | [Final Velocity]² - [Initial Velocity]² = 2 x Acceleration x Distance
[m/s]² [m/s]² [m/s²] [m] |
| Example of Uniform Acceleration? | Kimmy is running with a Final velocity of 19 m/s. She has been running for 0.3km with an acceleration of 6 m/s². Whats her Initial Velocity?
First Converge. 0.3 km= 300m.
Now get the formula
f²-i²=2xAxD
[19]² - [i]² = 2 x 6 x 300.
i² = [2 x 6 x 300] - [19²]
i² = 3239
i = 56 |
| How can you find out Acceleration? [Practical] | Grab a trolley and some stopwatches along with a ramp. Measure out the Distance too between the points of interest. Those interests will be the beginning, Runway and the End.
The times on the ramp will give you an Average speed on the ramp. [Distance divided by Time] and the time on the runway gives you the speed on the runway.
Acceleartion can now be found as the change in velocity is going to be your speed on the ramp/runway. [Initial Velocity was 0] |
| What factors affect the experiment on finding Acceleration? | Friction can slow the trolley down, Human reaction time might have delyaed the time, angles on the ramp. |
| Any solutions to those factors? | Makes sure the surface is clear and smooth, Light gates give a more accurate precise result and make sure you measure the angle of the ramp first. |
