### Kinematics

(a) The acceleration of the ball is .

Since is constant, the path is

,because and we can choose

This path is a straight line, with a direction given by .

And then

It will be useful to find the height:

(b) The magnitude (size) of the acceleration of the ball is The

time for the ball to travel down the hypotenuse of the figure is

(c) The magnitude of the speed of the ball at the bottom will be