State the equipment that would be used to calculate the speed of a falling tennis ball. (Why wouldn't a stop clock be
appropriate?)

Explanation:

Average Speed = distance moved

                                  time taken

To calculate the motion of everyday objects such as toy cars or tennis balls:  

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.