Answer:0.571 Hz
Explanation:
Given
Tennis coach passes back and forth [tex]8[/tex] times in [tex]14 seconds[/tex]
Frequency is defined as number of occurrence of an repeating event per unit time.
So for same event occur [tex]8[/tex] times in [tex]14\ sec[/tex]
Frequency is [tex]\frac{8}{14}=\frac{4}{7}\ s^{-1}[/tex]
[tex]=0.571\ Hz[/tex]
