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# An Unexplored Planet

Free
APPHMC-J44D4X

An astronaut on the surface of an unexplored planet gently throws a rock upwards. It takes 4.00 sec for the rock to reach a maximum height of 24.00 m relative to where it was released before coming back down.

If we take gravitational acceleration to be constant, what is the planet's gravity?

A

$-3.00 m/s^2$

B

$-2.00 m/s^2$

C

$-1.00 m/s^2$

D

$-0.50 m/s^2$

E

Cannot be determined