When she is traveling at a speed of 24ft/s, how many revolutions per minute are her wheels making?

The angular velocity of the wheel is 1080 rad/min.

Explanation:

Let the radius of the wheel is 16 inches. If the speed of the wheel is 24 ft/s. We need to find the angular speed of the wheel.

Since, 1 ft/s = 720 in/min

So, 24 ft/s = 17280 in/min

Let is the angular velocity of the wheel. It is given by :

So, the angular velocity of the wheel is 1080 rad/min. Hence, this is the required solution.

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.