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Homework Help: Physics-please check-this can't be right

Posted by Anthony on Saturday, October 9, 2010 at 3:48pm.

I asked about a golf ball hit at a 35 degree angle and the hole was 175 m away. What was speed of ball. I got a response, and it follows with my response. I'm not doing something right, can you help, please.Physics - drwls, Saturday, October 9, 2010 at 10:20am
You can come up with an answer that would cause the ball to reach the hole on the fly, but in most cases you would want to allow for the ball to roll up to the cup, for a shot that long.

To reach the hole as distance X on the fly with an A = 35 degree launch angle, use
X = (V^2/g)*sin(2A) = V^2/g * 0.9397

Plug in X = 175 m and solve for V



Physics-Please check - Anthony, Saturday, October 9, 2010 at 11:23am
I don't think I'm doing this correct.
I took 175 = v^2/9.8 x 0.9397
I did 9.8 x 0.9397 = 9.02
then I took 175/9.20=19.02

This can't be right-did I make a mistake with the variables? I'm not getting this- Please help

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