Wednesday

July 30, 2014

July 30, 2014

Posted by **Lusi.** on Tuesday, December 20, 2011 at 5:50pm.

- Math -
**Steve**, Wednesday, December 21, 2011 at 12:02amwhat does it mean when it hits the ground? height H(t) = 0. so, since

H(t) = -5t^2 + 20t + 60

= -5(t^2 - 4 - 12)

= -5(t-6)(t+2)

when do you think it hits the ground?

Then, since

V(t) = 20 - 10t

you can figure the velocity

**Related Questions**

science - a stone is thrown vertically upwards fron the edge of a cliff of ...

Dynamics - A stone is thrown vertically upward from the top of a 30m high ...

Dynamics - A stone is thrown vertically upward from the top of a 30m high ...

calc - a stone is thrown striaght up from the roof of an 80 foot building. the ...

Physics - A stone is thrown up vertically from the ground (the gravitational ...

physics - A stone with mass m = 2.3 kg is thrown vertically upward into the air ...

Physics - From the edge of the rooftop of a building, a boy throws a stone at an...

Physics - From the edge of the rooftop of a building, a boy throws a stone at an...

Uniswa - A stone thrown from the top of a building which is 30m is given an ...

physics - From the edge of the rooftop of a building, a boy throws a stone at an...