Thursday

July 31, 2014

July 31, 2014

Posted by **LeRoy** on Friday, April 10, 2009 at 2:27pm.

A player kicks a football with an initial velocity of 3.00 m/s at an angle of 60.0* above the horizontal. What is the horizontal distance traveled by the football?

s = vi*t + (1/2)(a)(t2)

0 = 3sin(30)t + 0.5(-9.8)(t2)

t = 0.306 seconds

x = vt there is no horizontal acceleration

x = 3cos(30)(0.306 seconds)

x = 0.795011321 meters

x = 0.795 meters

- Physics -
**drwls**, Friday, April 10, 2009 at 4:10pmThat would not even get over the line of scrimmage for a PAT! You DID correctly solve the quadratic equation for t. You should have used sin 60 degrees in the s=0 equation and cos 60 degrees in the x equation. You got the right answer anyway, because sin (60) cos(60) appears in the answer,. and that equals sin(30) cos(30).

The horizontal distance travelled is

X = (V^2/g) sin 2A, where A = 60 degrees.

The problem with your low answer is that they (or you) probably made a typo error in the initial velocity of the kicked football. It is more likely to be 30 m/s.

**Related Questions**

physics - A player kicks a football with an initial velocity of 3.00 m/s at an ...

physics - 11)Which has more momentum, an elephant standing still or a raisin ...

Physics - A player kicks a football from ground level with a velocity of ...

Physics - A boy kicks a football with an initial velocity of 20 m/s at an angle ...

Physics - A player kicks a football from the ground at an angle of 42 degrees ...

Physics - A football player punts the football so that it will have a hang time ...

physics - player kicks football from ground level with velocity of32 m/s at an ...

physics repost - A player kicks a football with an initial velocity of 3.00 m/s ...

physics - A punter kicks a football with a certain initial velocity of 13.8 m/s ...

Physics - A soccer player kicks a ball from the ground into the goal, which is ...