Tuesday

September 16, 2014

September 16, 2014

Posted by **Aziz** on Thursday, September 29, 2011 at 12:04am.

1) What is the initial speed of the ball?

2)What is the initial angle of the ball with respect to the ground?

3)What is the maximum height the ball goes above the ground?

4) How far from where it was kicked will the ball land?

5)What is the speed of the ball 2.1s after it was kicked? and how high above the ground after it was kicked?

- Physics -
**tchrwill**, Thursday, September 29, 2011 at 12:51pm1) The initial speed is V = sqrt(18^2 + 18^2)

2) µ = arctan(1.0) = 45º

3) The maximum height reached derives from h = V^2(sin^2(µ))/2g.

4) The distance traveled by the ball derives from d = V^2(sin(2µ))/g.

5) From Vf = Vo + gt, the time to reach the maximum height derives from 0 = 18 - 9.8t making t = 1.836sec, telling us that the ball is on the way down at 2.1sec, .264sec from the high point.

The vertical speed at this point is .264(9.8) = 2.58m/s making the net speed sqrt(2.58^2 + 18^2)

I'll leave the height of the ball at 2.1sec. for you to work out now that you have all the data.

- Physics -
**Victor**, Sunday, September 9, 2012 at 10:06pmlkjljlk

**Answer this Question**

**Related Questions**

Physics - 2-D kinematics - A soccer ball is kicked with an initial horizontal ...

Physics - A soccer ball is kicked with an initial horizontal velocity of 19.0 m/...

physics - a soccer ball is kicked with an initial velocity of 5.0 m/s^2 in a ...

Physics - A soccer ball kicked on a level field has an initial vertical velocity...

physics - a ball (mass = 0.250 kg) is kicked off a porch (h = 1.50 m above the ...

11th grade - a soccer ball is kicked with an initial velocity of 5.0 m/s in a ...

Physics - A football is kicked 65 m. If the ball is in the air for 4.3 s, find ...

Physics - A football is kicked 65 m. If the ball is in the air for 4.3 s, find ...

physics! - A soccer ball is kicked from the top of a 256 foot building with an ...

physics - A soccer ball is kicked from the ground with an initial speed of 14.5 ...