# Algebra

A football is kicked off the ground at an initial upward velocity of 20 m/sec.
(We are using d=rt-5t^2)

a. Calculate the altitude after 2.7 sec
b. When will the ball be at 17 m above the ground?
c. When is the ball at the highest point?
d. How high is the ball at its highest point?

1. 👍 0
2. 👎 0
3. 👁 81
1. altitude= Vi*time- 4.9 time^2
use that for a, b.

For c, note that velocity at the top is zero.

Vtop=Vi*time-4.9t^2
solve for time

d. use the first equation again.

1. 👍 0
2. 👎 0
2. a.10

1. 👍 0
2. 👎 0
posted by Alfred

## Similar Questions

1. ### Math

A football is kicked with an initial velocity of 42 ft/sec at an angle of 35 degrees with the horizontal. How far has the football traveled horizontally after 0.5 sec? round to nearest tenth. Could someone explain this please?

asked by House on October 6, 2008
2. ### Physics

A football player kicks a football with an initial velocity of 30m/s at an angle of 55 degrees relative to the flat ground. a)what is the speed of the football at its highest point b)find the highes point reached c)find the total

asked by Daniel on December 13, 2009
3. ### Math(repost)

A football is kicked with an initial velocity of 42 ft/sec at an angle of 35 degrees with the horizontal. How far has the football traveled horizontally after 0.5 sec? round to nearest tenth. Could someone explain this please?

asked by House on October 6, 2008
4. ### Physics

A soccer ball is kicked with an initial horizonal velocity of 18 m/s and an initial vertical velocity of 18 m/s. 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

asked by Aziz on September 29, 2011
5. ### Physics

Initial Statement: A soccer ball is kicked with an initial horizontal velocity of 15 m/s and an initial vertical velocity of 14 m/s. 1) What is the initial speed of the ball? 20.518 2) What is the initial angle θθ of the ball

asked by Aidan on August 28, 2016
6. ### physics

A soccer ball is kicked with an initial horizontal velocity of 16 m/s and an initial vertical velocity of 17 m/s. 1) What is the initial speed of the ball? 2) What is the initial angle θθ of the ball with respect to the ground?

asked by Hallie on September 11, 2016
7. ### Physics

A football is kicked from the ground at 27 m/s at an angle of 42 degrees above the horizontal (ground). No one gets in the way until after it hits the ground. Use the value g=9.8 m/s^2. Assuming that the ground is level and that

asked by Sandy on October 27, 2010
8. ### Physics

A football is kicked from the ground at 27 m/s at an angle of 42 degrees above the horizontal (ground). No one gets in the way until after it hits the ground. Use the value g=9.8 m/s^2. Assuming that the ground is level and that

asked by Sandy on October 27, 2010
9. ### Physics

Football is kicked up into the air with a velocity of 20m/s. a. Determine the time the football is in the air. b. Determine the maximum height the football would reach. c. As the ball is kicked it encounters a weird horizontal

asked by Sarah on November 19, 2012
10. ### Physics - 2-D kinematics

A soccer ball is kicked with an initial horizontal velocity of 20 m/s and an initial vertical velocity of 16 m/s. I've calculated: Initial Speed: 25.61 m/s Angle: 38.66 degrees Maximum Height it reaches: 13.06 m Distance kicked:

asked by Anonymous on February 3, 2012

More Similar Questions