Yes, it affects the friction.
The gravitational force is.
If you were to roll a marble (across what doesn't matter), what slows the object down is called traction.
One gathers multiple rolls of toilet paper; ply number does not matter, simply find the roll with the greatest number of sheets or appears to be the longest. Take the roll of toilet paper, rip the glued piece so the roll is now free to unravel. Unravel the roll about five feet and then throw the roll over the house with the roll on top and the unraveled piece on bottom. Through it over an edge with the tail on the side of the house that you are on, and it will unravel down the other side of the house.
The theoretical probability of rolling a 5 on a standard six sided die is one in six. It does not matter how many times you roll it, however, if you roll it 300 times, the theoretical probability is that you would roll a 5 fifty times.
3
Twice as long as it takes to roll halfway down the same ramp. Without knowing the size of the ball, and the length & angle of the ramp, thats the best I can tell you.
The heavy the crayon, it will roll down but it needs force to move it back up
Gravity
gravity
The gravitational force is.
It has Potential energy.
gravity assuming the car was off, and not in park
The small ball
A ramp. Items you can not lift up, you can roll up a ramp. People can not lift someone in a wheel chair, but they can roll him up a ramp or an inclined plain.
"If the ramp is steeper than the ball will roll faster" can be observed during experiments. "Friction slowed the ball down" and "Gravity caused the ball's motion" are both conjectures (guesses).
apply friction a rough surface cardboard for example, the rougher it is the slower the ball will roll but to much friction and it will stop altogether.
The material of the ramp, the volume of the ball, and the mass of the ball.