Hypothesis:
I believe that the higher the ramp is, the faster the trolley will move. This is because, the more the height of the car increases from the ground, the more potential energy increases. The more potential energy the trolley has, the more the kinetic energy increases and that means that the speed increases. Since we were supposed to alter one variable, and the mass in the formulae is the same, the height of the traveling object has to alter the speed.

Formulae for the energies:
Potential energy = mass x gravity x objects height from floor
Kinetic energy = mass x velocity2
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Methods

First we began by placing a ramp on a ramp-holder's first level. Next, we measured a distance of two meters on the ramp, where the trolley was supposed to travel. Subsequently, we placed a trolley on the ramp, and let-go of the trolley. After each trail, we recorded the time it took for it to reach the "finishing line". After 20 trials, we placed the ramp on the ramp-holder's next level, for 20 new trials. We measured the ramp-holder's next level with a ruler, to obtain the height of it (in meters).

Equipment:

We used these equipment during the experiment:

" A ramp holder
" A two meters ramp
" A stopwatch
" A ruler
&
" A 1 Kg black trolley.


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