I have been struggling on this problem for a while know. I know that you have to

Question

I have been struggling on this problem for a while know. I know that you have to use a kinematic equation but i cannot figure out how to plug in the numbers and which one to plug them in to.

Your current case as an FBI investigator involves a possible assassination attempt. The crime scene is a tall building, about 150 m high. As a foreign official was walking into the building, a flowerpot fell from above him and nearly landed on his head. One witness says that someone accidentally knocked the flowerpot from a twenty-fourth-story window, 94 m above the ground. Another witness was inside the building looking out of an eighteenth-story window when she saw the flowerpot fall. She claims that the flowerpot took exactly 0.044 s to fall from the top of the window to the bottom of the window, a distance of 1.5 m. (She knows this because she was videotaping her pet dachshund doing tricks and the flowerpot falling past the window was filmed in the background.) The top of the eighteenth-story window is 75 m above the ground.Could the flowerpot have fallen with zero initial velocity from the twenty-fourth-story window?

Explanation / Answer

as the pot is freely falling body the initial velocity will be zero (u = 0)

we use the equation of motion

s = u t + (1 / 2) a t2

where a = + g

= 9.8 m / s2

u = 0

t is the time taken to reach the ground

s is the displacement (height)

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