The Mars probe Pathfinder is designed to drop the vehicle's instrument package from a height of 20 meters above the Martian surface, after the speed of the probe has been brought to zero by a combination parachute-rocket system at that height. To cushion the landing, giant air bags surround the package. The mass of Mars is 0.10740.1074 times that of Earth, and the radius of Mars is 0.52820.5282 that of Earth. Find (b) how long it takes for the instrument package to fall the last 20 meters.


Answered 2 years ago
Answered 2 years ago
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The package comes to rest, so its final velocity is zero vv =0 m/s. To get the traveled time tt, we use the kinematic equation by

h=vt12gt2\begin{equation} h = vt -\dfrac{1}{2} g t^2 \end{equation}

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