contestada

A car drives carrying a flag of width w=0.5m. when the flag goes through a photogate, it blocks and unblocks a light. if the average speed of the car is 20m/s, what is the photogate time interval in seconds?

Respuesta :

width of the flag is given as

[tex]w = 0.5 m[/tex]

speed of the car will be

[tex]v = 20 m/s[/tex]

now the time to cross the photogate by the flag is given as

[tex]t = \frac{d}{v}[/tex]

[tex]t = \frac{0.5}{20}[/tex]

[tex]t = 0.025 s[/tex]

so the time interval will be 0.025 s