Posted by Sam on Thursday, October 7, 2010 at 4:37pm.
I have a golf ballthat is hit for 0.20s at an angle to the horizontal and it hits the ground some distance away. Initial speed is 30m/s and angle of projection is 35. Calculate the time between when the ball was hit and when it first touched down.
I think it should be 30m/s cos 35/9.8.
If not correct please let me know what formula to use.

PhysicsJust need a formula, please and check  Sam, Thursday, October 7, 2010 at 5:05pm
Can someone please just check this problem and let me know if its wrong and the correct formula
Thank you

Physics  bobpursley, Thursday, October 7, 2010 at 5:10pm
Well, it is correct.

Physics  drwls, Thursday, October 7, 2010 at 5:11pm
Your formula is incorrect. Dividing the horizontal velocity component by g does not get you the time of flight. Note that, with your formula, the time of flight would be zero if the ball were hit straight up.
The time of flight, T, is the time it takes the ball to go up and then come back down. Those two times are equal.
T = 2 V sin35/g

Physics  bobpursley, Thursday, October 7, 2010 at 5:13pm
drwls is correct.

PhysicsI'm really confused with two different answers  Sam, Thursday, October 7, 2010 at 5:16pm
So I should say
2 times (20sin35)/9.8 = 2.34
I'm really confused because one said it's correct and you said what I did is wrongPlease help

Physics  bobpursley, Thursday, October 7, 2010 at 5:17pm
reread.

Physics  drwls, Thursday, October 7, 2010 at 7:10pm
The time of flight is 2*(30sin35)/9.8 = 3.51 seconds.
I do not understand why the question began with a statement that the ball is hit for 0.2 s. You do not need that bit of information to answer the question about the time of flight. You could use it and the ball's momentum leaving the club face to calculate the average force of the club on the ball.

Physics  Sam, Thursday, October 7, 2010 at 8:04pm
Thank you, I appreciate itI understand it now
Answer This Question
Related Questions
 Physics  A golf club contacts a golf ball for 0.15s at an angle to the ...
 Physics  A golf club contacts a ball for 0.15 s at angle to horizontal and the ...
 Physics  A golf club contacts a ball for 0.15 s at angle to horizontal and the ...
 Physics  A golf ball is hit with an initial angle of 30.5° with respect to the ...
 Physics  A golf ball is hit with an initial angle of 54.7o with respect to the ...
 physics  A golf ball is hit with an initial velocity of 50 m/s at an angle of ...
 Physics  Berry Bonds hits a baseball ball with an initial speed of 35m/s at an ...
 Physics  A airplane has a speed of 290 km/h and is driving at an angle of 30 ...
 physics  You hit a 0.2 kg golf ball up at 40o from the horizontal. It travels ...
 physics(please help...very urgent.....)  A ball is hit at an angle of 36 ...
More Related Questions