Friday

April 18, 2014

April 18, 2014

Posted by **Jessica** on Sunday, November 25, 2012 at 8:25pm.

- Math -
**Steve**, Sunday, November 25, 2012 at 8:57pmthe height h at time t is given by

h(t) = 480 - 16t - 16t^2

when it hits the ground, h=0, so solve

30-t-t^2 = 0

(6+t)(5-t) = 0

t = 5 sec.

the velocity v at time t is

v = -16 - 32t

v(5) = -16 - 160 = -176 ft/s

**Related Questions**

physics - Consider a rock that is thrown off a bridge of height 27 m at an angle...

Physics - Example 1: (Rock A) is thrown against a larger stationary rock(Rock B...

physics - A rock is thrown vertically upward from the ground with an initial ...

physics - A rock is thrown vertically upward from the ground with an initial ...

College Physics - Consider a rock thrown off a bridge of height 78.5 m at an ...

physics - A rock is thrown upward from the level ground in such a way that the ...

math - A rock is thrown vertically up from the ground with a velocity of 24 ...

physics - A small rock is thrown vertically upward with a speed of 13.0 from the...

Physics - A small rock is thrown vertically upward with a speed of 13.0 m/s from...

physics - A rock is thrown vertically upward from the edge of a cliff. The rock ...