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

Physics-please check-this can't be right - bobpursley, Saturday, October 9, 2010 at 3:58pm
YOu didn't do it right.

I took 175 = v^2/9.8 x 0.9397 right
which is 175*9.8/.9397=V^2
Physics-please check-this can't be right - Anthony, Saturday, October 9, 2010 at 4:14pm
First,is that the correct formula? I redid it, I think it should be 43 for the speed. Is that correct? If not, please direct me on what I'm doing wrong.
Physics-please check-this can't be right - bobpursley, Saturday, October 9, 2010 at 4:27pm
It is the correct relation. You need to start doing some analysis, not searching for "correct" formulas.

Consider the time in air: vertical
hf=hi+VsinThetat-4.9t^2
VsinTheta=4.9t
t= you do it.
Then,horizontal
distance=VcosTheta*t above, and reduce it.
Remember that sin2A=2sinAcosA
Physics-please check-this can't be right - Anthony, Saturday, October 9, 2010 at 5:49pm
Thank you,
Sorry to have not understood it-I apologize

Answer this Question

Related Questions

Physics - Can someone help with this calculation, please? A golf ball is hit at ...
grade 11 physics - A championship golfer uses a nine iron to chip a shot right ...
Physics - I have a golf ballthat is hit for 0.20s at an angle to the horizontal ...
Physics - A golf ball is hit with an initial angle of 30.5° with respect to ...
Physics - A golf ball is hit with an initial angle of 54.7o with respect to the ...
Math - A golfer hits a tee shot on a 285m long straight golf hole. The ball is ...
Physics HW, Please Help - A seasoned mini golfer is trying to make par on a ...
Physics HW Help, Please - seasoned mini golfer is trying to make par on a ...
physics - Tiger Woods can hit a golf ball quite hard. A golf ball just after ...
physical science - on hole 9,Bill hit a golf ball. The golf ball weights 0.45 kg...

For Further Reading

First Name:
School Subject:
Answer: