Sunday

March 1, 2015

March 1, 2015

Posted by **kaley** on Sunday, January 6, 2008 at 5:21pm.

a. what is its velocity after 3 seconds

b. when does it hit the ground

c. when it hits the ground, what's the net distance it has traveled.

d. when it hits the ground, what is the total distance it has traveled

- math -
**Damon**, Sunday, January 6, 2008 at 5:55pma) use v = Vo - gt

b ) use equation in part a to find out when v = 0. At that point the thing is as high as it will go. It will spend the same time falling so double the time you found for ascent to find out when it hits the ground.

c) LOL it came right back to where it started if you shot straight up :)

d) we know how long it took to get to the top (half of the final answer in part b)

so how far up did it go?

Y = Yo + Vo t +(1/2) a t^2

Y = 0 + 90 t - 16 t^2 where t is half the total time aloft from part b

double that answer to include the distance it fell.

- math -
**alyssa**, Sunday, January 6, 2008 at 6:52pmsimplifing fractions

- math -
**Damon**, Sunday, January 6, 2008 at 7:18pmalyssa in general factor top and bottom and cancel like factors

for example 12 /16

= 2*2 *3

-----------

2*2 *2*2

so it is really 3/4

**Answer this Question**

**Related Questions**

Math - A projectile is fired straight up from a cliff which is 200 feet above ...

Physics - A projectile is fired straight up from a cliff which is 200 feet above...

math - A projectile is fired directly upward with a muzzle velocity of 860 feet ...

Intermediate Algebra - If a projectile is fired straight upward from the ground ...

physics - a projectile is fired from the top of a building with an initial ...

math - A stone is thrown straight up from the edge of a roof, 700 feet above the...

calculus - A stone is thrown straight down from the edge of a roof, 750 feet ...

college algebra - The height of a projectile fired upward is given by the ...

AP Calculus - A projectile fired upward from ground level is to reach a maximum ...

Math - If a shot is fired directly upward at 1200 feet per second from a ground ...