- #1
iJamJL
- 58
- 0
Homework Statement
Assume the air temperature is 10.8o C, and the speed of sound in air is 337.8 m/s. Suppose the lab floor is 2.61 m beneath the motion detector. If the detector produces a click, how long would it take before the echo returned?
Homework Equations
s=Vi*t + (.5)*(a)*(t^2)
The Attempt at a Solution
I just wanted to make sure I'm doing this correctly.
When going down:
distance = Vi(t) + (.5)*a(t^2)
2.61*2 (double distance) = 0 + [9.81*(t^2)] / 2
10.44 / 9.81 = t^2
t1 = 1.0316