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Projectile help needed!

  • #1
A golfer wants to hit the ball a horizontal distance of 130M and 20M above his tee-off point, but wants the ball to land 10 M below his tee-off point. What is the balls Initial velocity?


S= VoT+1/2AT²
V= Vo+AT
V²=Vo²+2AS

So far I have broken up the graph into 3 Parts...from Point A to Point B i have solved for the Y direction.
Ay= -9.81m/s²
Voy= 19.8m/s
Vx= 0
Sy= 20m
T= 2s

But I cant seem to start off in the X direction...do I go from Point A to C? B to C in the Y direction? im really lost everytime I try to solve another direction from ethier point I have no information to create a solution.

btw the answer is Vo= 35.1 m/s angled at 34.4 so please just help me from understanding how to go from here.
 

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  • #2
verty
Homework Helper
2,164
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You must do things in this order: determine the Y component of initial velocity, determine the time for the ball to reach C, determine the X component of the initial velocity using the time.

What part of these three steps are you struggling with?
 

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