A ball rolls down hill because there is no force preventing it from moving. If there was an object in the way, that would be the force that counters the movement/roll.
Balls roll down hills because of gravity. The Earth attracts the ball.
Because it is something due to gravity and friction. e.g. Friction is something that rub two things together like a ball and the road.
its motion and accelaration are in opposite directions
Things roll downhill because of the force of gravity.
The ball will roll down the slope because the slope is smooth and slanting. the friction applied is minimum, that's why the ball rolls
gravity
Friction is one force causes a ball to roll downhill. The smaller the static friction coefficient, the more liable the ball will be to skidding instead of rolling. Static friction is involved in a ball rolling downhill.
There is always gravity that is pulling the ball down. Therefore, the ball will roll until another force is acted upon it.. Like when the hill ends.
to make a forward roll harder there are many things you could do heres a list of some: handstand forward roll dive roll forward roll to standing stradle forward roll staight legs free roll (no hands) forward roll on beam/bench and much more
You can throw it, roll it, kick it and headbut it. You could also squeeze it.
propensity
gravity
Gravity
A zorb is a large transparent ball in which someone may roll downhill.
If the cart is rolling downhill it will roll faster with mass, but on level ground or uphill it will roll faster without mass.
Round objects don't have to roll down hill, they can slide if they have a heavier side, but are more likely to roll due to gravity.
They are already at the bottom of the hill. Can't roll down any further.
why do balls roll
The ball would roll downhill.
There must be some sort of force. Either the table is tilted so gravity makes the can roll downhill. Or an invisible force is used: magnetic or air jet.
The big inflatable balls that you can climb into and roll down a hill are called Zorbs. This activity is known as zorbing, globe riding, or sphering.
There are a number of names for the balls - generally they are called zorbing balls or OGOs.