An electrical motor spins at a constant 1103 rpm. If the armature radius is 5.427 cm, what is the acceleration of the edge of the rotor?

magnified images possible images can be real = projected onto a screen

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.