# Physics

posted by .

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.

• Physics-Just need a formula, please and check -

Can someone please just check this problem and let me know if its wrong and the correct formula

Thank you

• Physics -

Well, it is correct.

• Physics -

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 -

drwls is correct.

• Physics-I'm really confused with two different answers -

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 wrong-Please help

• Physics -

• Physics -

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 -

Thank you, I appreciate it-I understand it now

## Similar Questions

1. ### Physics

A airplane has a speed of 290 km/h and is driving at an angle of 30 degrees below the horizontal when the pilot releasese a radar decoy. The horizontal distance between the release point and where the decoy hits the ground is 700m. …
2. ### physics

A golf ball is hit with an initial velocity of 50 m/s at an angle of 45 degrees with the horizontal. How far will it travel horizontally before it hits the ground?
3. ### Physics

A golf ball is hit with an initial angle of 30.5° with respect to the horizontal and an initial velocity of 81.9 mph. It lands a distance of 86.8 m away from where it was hit. By how much did the effects of wind resistance, spin, …
4. ### Physics

A golf club contacts a golf ball for 0.15s at an angle to the horizontal and the ball strikes the ground a distance away. Initial speed is 25 m/s Angle of projection is 15 degrees Calculate time between ball leaving club and when it …
5. ### Physics

A golf club contacts a ball for 0.15 s at angle to horizontal and the ball strikes ground distance from fairway. Initaila speed 25 m/s and angle of projection is 15 degrees Calculate time between ball leaving club and when it first …
6. ### Physics

A golf club contacts a ball for 0.15 s at angle to horizontal and the ball strikes ground distance from fairway. Initial speed 25 m/s and angle of projection is 15 degrees Calculate time between 1.ball leaving club and when it first …
7. ### Physics

Berry Bonds hits a baseball ball with an initial speed of 35m/s at an angle of 50 degrees with respect to the horizon. The playing field is surrounded by a 4.0m tall wall. Assume that when hit, the ball is initially very close to the …
8. ### Physics

A golf ball is hit with an initial angle of 54.7o with respect to the horizontal and an initial velocity of 85.1 mph. It lands a distance of 104.3 m away from where it was hit. By how much did the effects of wind resistance, spin, …