Wednesday

April 23, 2014

April 23, 2014

Posted by **nicky** on Friday, October 12, 2012 at 2:50pm.

- phy -
**bobpursley**, Friday, October 12, 2012 at 3:06pmin the vertical:

hf=hi+vi*t-4.9t^2

0=45+20*sin30*t-4.9t^2

put that in standard form for a quadratic

at^2+bt+c=0

use the quadratic equation

t=(-b+-sqrt(b^2-4ac))/2a

**Related Questions**

Physics - A stone is thrown from the edge of a cliff into the ocean below. It is...

Physics - A stone is thrown from the edge of a cliff into the ocean below. It is...

civil engineering - A stone (on the edge of the roof) thrown from the top of a ...

Physics - A stone is thrown straight upward with a speed of 12 m/s from the edge...

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

physics - A stone is thrown vertically upward with a speed of 14.0 m/s from the ...

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

math - A ball is thrown from the edge of a cliff with an initial velocity of 60·...

science - A stone is thrown vertically upward with a speed of 11.0 m/s from the ...

physics - 9. A stone is thrown at an angle of 30° above the horizontal from the...