Imagine that you are on mars, and you are swinging a pocket watch back and forth. you time the period of this simple pendulum to be 2.6 seconds, and you measure the chain on the pocket watch to be 63 centimeters. using this information, figure out what the gravity of mars is.

The path of a satellite orbiting the earth causes it to pass directly over two tracking stations a and b, which are 51 miles apart. when the satellite is on one side of the two stations, the angles of elevation at a and b are measured to be 87 degrees and 84 degrees, respectively. (a) how far is the satellite from station a? (b) how high is the satellite above the ground?