Quiz 3 Begin Date: 6/17/2018 12:01:00 AM -- Due Date: 7/5/2018 11:59:00 PM End D
ID: 1863915 • Letter: Q
Question
Quiz 3 Begin Date: 6/17/2018 12:01:00 AM -- Due Date: 7/5/2018 11:59:00 PM End Date: 8/16/2018 11:59:00 PM (33%) Problem 3: A rescue helicopter is hovering over a man whose vessel has capsized. One of the rescuers tosses a life preserver straight down to the man with an initial speed of I.25 m/s and notices that it takes 1.55 s to reach the water. How high above the water was the preserver released? Note that the downdraft of the helicopter reduces the effect of air resistance on the falling life preserver, so that an acceleration equal to that due to gravity is reasonable. Grade Summary Deductions 0% Potential 100%Explanation / Answer
Using 2nd equation of motion
S= ut+ 0.5gt^2
= 1.25* 1.55 +0.5* 9.8* 1.55^2
= 13.71 m
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