Physics, 13.02.2020 01:30 edginutystudent
: A stone is thrown from a rooftop at time t = 0 seconds. Its position at time t is given by r(t)=8t i -5t j +(14.7-4.9t^2)k . The origin is at the base of the building, which is standing on flat ground. Distance is measured in meters. The vector i points east, j points north and k points up. A)How high is the rooftop?B)When does the stone hit the ground?C)Where does the stone hit the ground?D)How fast is the stone moving when it hits the ground?
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m/s
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