put a co2 (carbon dioxide) cartridge on the end of your toy car, co2 cartridges could be balloons or any empty object you can put air into, once done let the co2, or air go and watch your toy car fly like a monkey without a bannana or use a fan
You attach a magnet to it then use another magnet and put that by the other magnet attached to the car.
employ either a magnetic field (as above), or a gravitational field, or an electro-static field, or a strong force field (although I don't know how you would do this), or a weak force field (which I don't know how you would do).
To make something move you must apply some force. It is impossible to move or stop some thing without force but it is not true that to apply force you must touch. There are some Force that act without touching called Non-cantact force
Some of theme are:-
Magnetic force
Electrostatic force
Gravity force
In your case magnetic force can help if if is ferromagnetic substance
Else you can use electrostatic force by using charges
-Thunder
use a carton box with wheels but then
make sure it has a lever & what not
Ju
You could put a small motor in it.
All other factors being equal, a heavier toy car will move slower than a lighter toy because of it's weight.
when you enter a toy car on the floor and you push it whwre you want directions.what made the car move?
A heavier toy car is better to go down a ramp and make a jump better than a light car because the heavier the toy car is, the faster gravity will force it to roll down the ramp, and with all its speed, be able to make the jump. Of course, you wouldn't want to make the toy car so heavy so that it barely or doesn't move at all. Just like drops of water when it's raining outside and a few drops hit your window. The heavier drops drip off faster than the smaller ones, and that goes the same with cars, too.
I'll accept that. What's your question ?
remote control
You could put a small motor in it.
because the little toy car doesn't move by its self
A slot car toy is an automatic toy car and can move by itself and a regular toy car you move yourself. The only difference is they can speed on their own!
Limitations in science are for example if your sayingan example of a physical modal is a toy car the limitation of the toy car is touching or feeling it.
you use magnetic force
you can make a toy car move with a ballon and pump by blowing balloon up and leting the pump go
Rubber band car
This is because the work done in order to move the toy car is smaller than that of the car with the added mass, and so the battery will have to work harder to move the toy car with the mass added
you push it
forward and backwards
wind