Sammy Sosa throws the baseball with initial speed of 145 feet per second at a 20 degree angle to the horizontal. The ball leaves Sammy’s hand at 5 feet high. When does the ball reach its maximum height?

Question

anonymous · Answer

initial vertical speed would be 145sin(20) ... 

the time when the ball reaches the highest point is when the vertical speed is zero.  

lets use the equation vf = vo + at  ... just plug in vf to be 0 and vo to be what we calculated and a is -9.81

anonymous · Answer

that value for gravity is in m/s^2, but in the problem hes using ft, so use -32.174 ft/s^2 instead.

anonymous · Answer

good call...

anonymous · Answer

my professor drilled units into us like mad :( i can hear him yelling at me now lol >.<