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Investigate and understand the relationship between the kinetic energy and stopping distance of a toy car.

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To investigate and understand the relationship between the

kinetic energy and stopping distance of a toy car    

Henry Agyei

10 Lowry


I predict that the when the vehicle is tested at 10 books high there will be a greater amount of gravitational potential energy than at 5 books high, which will be converted into kinetic energy when the car is released; giving the car a longer stopping distance.

I think the cars at 10 books high will travel further. I think that the times taken for the cars to stop at both heights will be similar but in general the 5 books will take longer time to stop. I think that the heaviest car will travel the furthest distance.

Fair Test:

I will make my test fair by:

  • Instead of trying to push the cars from their stationary positions, I will place them all onto the ramp and let them go, so that no cars have an unfair head start.
  • Also I will make sure that the starting positions of all of the cars is the same and this will be done by marking a starting line on the ramps.
  • By measuring the height and angle of 5 books and 10 books so that when continuing the experiment no car would have an advantage
  • By using the same ramp to keep consistency
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10 books high










Blue Car

10 books high












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I conclude that the relationship between the stopping distance and kinetic energy is that the more of the kinetic energy that there is, the longer the stopping distance.

The fastest car was the yellow car on all three attempts. The yellow car was also our heaviest car. The greater the mass, the larger the acceleration needed to slow it down. As the force of friction is not increasing all that much in proportion to the increased mass, the more mass an object has, the longer it will take to decelerate and the longer its braking distance will be.

There are 2 sorts of friction. These are static and dynamic friction in order for the cars to move they had to overcome both of these.

...read more.

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