The force that causes a car to roll on an incline is gravity. Gravity pulls the car towards the center of the Earth, and on an incline, this force acts perpendicular to the surface of the incline, causing the car to roll downwards.
Yes, the weight of the car does affect its rolling motion on an incline. A heavier car will have a greater force of gravity pulling it down the incline, resulting in a faster rolling motion compared to a lighter car.
The angle of the incline affects the rolling motion of a car by changing the magnitude and direction of the force of gravity. A steeper incline will have a greater force of gravity pulling the car down, resulting in a faster rolling motion, while a gentler incline will have a smaller force of gravity and a slower rolling motion.
Besides the weight of the car and the angle of the incline, other factors that can affect the rolling motion of a car on an incline include the coefficient of friction between the car's wheels and the incline surface, the shape and size of the car's wheels, and any external forces or obstacles that may impact the car's motion.
If the incline is not flat, the rolling motion of the car will be affected by the change in angle along the incline. The car will experience a change in speed and direction as it moves up or down the incline, depending on the shape and steepness of the incline. The car may also experience changes in acceleration and friction forces as it encounters different parts of the incline.