a tennis player uses a strobe lamp to measure the speed of his serves. The lamp flashes every 1/100 of a second. A camera records the ball moving 31cm between flashes. what is the speed of the ball in m/s?

Question

anonymous · Answer

v = delta x / delta t
delta t = 1/100 s
delta x = 31 cm
m/s -> 100cm : 1 m
.31/(1/100) = 31m/s
I'm pretty sure. I took ap physics b last year, this is pretty basic kinematics.

anonymous · Answer

thanks :) this was a little advanced for a 7th grader like me :(

anonymous · Answer

no problem :) i miss 7th grade physics :p