Person a because it stays the same
Answer:
427.196 m
Explanation:
u = Initial velocity = 312 m/s
t = Time = 1.4 s
s = Displacement
a = -9.8 m/s² (because the bullet is decelerating as the bullet is going straight up)
Equation of motion
![s=ut+\frac{1}{2}at^2\\\Rightarrow s=312\times 1.4-\frac{1}{2}\times 9.8\times 1.4^2\\\Rightarrow s=427.196\ m](https://tex.z-dn.net/?f=s%3Dut%2B%5Cfrac%7B1%7D%7B2%7Dat%5E2%5C%5C%5CRightarrow%20s%3D312%5Ctimes%201.4-%5Cfrac%7B1%7D%7B2%7D%5Ctimes%209.8%5Ctimes%201.4%5E2%5C%5C%5CRightarrow%20s%3D427.196%5C%20m)
So, Displacement at 1.4 seconds is 427.196 m
Answer:
A police radar gun uses X-band microwave radiation at a frequency of 13.1 GHz. Microwaves travel at the speed of light, or 3x108 m/s. Since the frequency shift will be small for practical car speeds and difficult to detect, the shifted frequency is compared to the original frequency, and the resulting beat frequency is used to determine the speed of the car.
a.) If Michael is traveling at 29 m/s, what is the resulting beat frequency that the radar gun detects?
ANSWER: 2533 Hz
Explanation: