gravity. Going uphill is always harder thatn going along the flat.
friction
yes because Gravity is pulling it down and the heavier the mass the farther it will travel down the ramp. The heavier it is the more gravity has to pull down
One factor is the height of the ramp. The higher the height of the ramp the further the car travels. Another factor is the surface of the ramp. With a rough surface on the ramp e.g sand paper the car travels a short distance. With a lubricated surface on the ramp e.g Vaseline the car will travel a very long distance.
In terms of physics, the length makes no difference.
If angled downward while increased, acceleration is increased also, as in if something were sliding down the ramp, it would go faster if angle downward is increased.
The ball rolling down the ramp might not have had time to reach 9.8 m/s^2. Also the coefficient of kinetic friction might have been high for the surface of the ramp.
I would say a ramp because there is no sharp corners to hurt yourself with, Personally avoiding the fall all together might be your best bet.
A ramp is also known as an inclined plane, this is to help whatever object (preferably one with wheels of course) to gain momentum (gain speed) as it goes down the ramp
how does increasing the height of a ramp affect how far a ball rolls down the ramp
yes This is because of the fact that gravity is a measure of acceleration. The longer the car has to accelerate the faster is will be by the end.
Yes.
Changing the slope of the ramp will affect the speed of the vehicle going down it.
Yes. The height of the ramp does affect the speed going down it the higher the ramp the faster the car goes down it