Problem 104GP

At the 18th green of the U.S. Open you need to make a 20.5-ft putt to win tie tournament. When you hit the ball, giving it an initial speed of 1.57 m/s, it stops 6.00 ft short of the hole. (a) Assuming the deceleration caused by the grass is constant, what should the initial speed have been to just make the putt? (b) What initial speed do you need to make the remaining 6.00-ft putt?

Solution 104GP

Step 1 of 4:

Calculate the required initial speed of the ball to just make the putt.

Then calculate the initial speed of the ball to make it to the putt from 6.00 ft.

(a)