Distance is multiplicd in a machinc. MA =
cffort arm length
load arm length
MA =
input distance
output distance
measured
actual MA =
force
output
measured input force
For each problem below, determine which equation you need to use, and solve the
problem. Be sure to show your work.
1. A baseball player swings her bat and hits a baseball. The player's hands move a distance
of 1.0 m while the end of the bat moves 1.5 m. What is the mechanical advantage of
the bat?

To place a communications satellite into a geosynchronous orbit at an altitude of 22,240 mi above the surface of the earth, the satellite first is released from a space shuttle , which is in a circular orbit at an altitude of 185 mi, and then is propelled by an upper-stage booster to its final altitude. as the satellite passes through a, the booster's motor is fired to insert the satellite into an elliptic transfer orbit. the booster is again fired at b to insert the satellite into a geosynchronous orbit. knowing that the second firing increases the speed of the satellite by 4810ft/s, determine (a.) the speed of the satellite as it approaches b on the elliptic transfer orbit, (b.) the increase in speed resulting from the first firing at a.