Does weight effect the distance of a toy car?

Answer 1

Yes since it has more wieght

IMPROVING ANSWER: More weight (mass) in any vehicle can be a good thing or a bad thing. If you are pushing the vehicle, especially up a hill, it takes more energy to get it moving, compared to what it would take to move a lighter vehicle of the same size and shape.

But once you get to the top of that hill, like if you are releasing a toy car on a ramp or slope, more weight will make it go faster. You spent your energy (from your muscles) lifting and carrying that toy car to the top of that ramp, and the heavier it was the more energy you had to spend. Now when you are letting it roll down, that extra mass of the vehicle will be converted to more speed and/or a longer roll before it stops.