Answer:
6 seconds.
Step-by-step explanation:
Given,
Matt starts 9 ft from a motion detector. He walks towards the motion detector at a constant rate of 1 1/2 feet per sec or 3/2 feet/sec.
We know that, s= vt
here, s or distance is 9 feet and the constant velocity is 3/2 feet per second or 1.5 feet/sec.
According to the formula, t= s/v
Or, t= 9/ 1.5 = 6
So, Matt will take 6 seconds to reach the motion detector.