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When a car is situated at the top of ramp, we say it has gravitational potential energy.
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When a car is situated at the top of ramp, we say it has gravitational potential energy. When the car travels down the ramp, the gravitational potential energy is transferred to kinetic energy; so therefore KE= ?é?¢mv2 Kinetic Energy = ?é?¢ x mass x velocity2 At the bottom of the ramp work has to be done in order to stop the car; so therefore Work Done = Braking Force x Braking Distance Also, this must be equivalent to the original energy of the car, which was gravitational potential. So, assuming no other loss...
to 3.s.f. ?óÔé¼ÔÇ£ this remains constant throughout my investigation.

Prediction

As I now know the braking force I can predict a series of braking distances, by using this equation;

KE ?é?¢mv2 ?â?À BF = BD

Here are my predicted results;

Speed m/s KE?é?¢mv2 Braking Force Predicted Breaking Distance

0.25 0.0032 0.04 0.08

0.5 0.0129 0.04 0.32

0.75 0.0290 0.04 0.73

1 0.0515 0.04 1.29

1.25 0.0805 0.04 2.01

1.5 0.1159 0.04 2.90

1.75 0.1577 0.04 3.94

2 0.206 0.04 5.15

2.25 0.2607 0.04 6.52

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