As we increased the mass of the ball what happens to the acceleration?

As the mass of an object increases, its acceleration decreases. Acceleration is inversely proportional to mass.

away from the curb

explanation:

the wheels would then hit the curb if it started to rolling, decreasing the chance of an accident.

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >