Sunday

January 25, 2015

January 25, 2015

Posted by **Anonymous** on Sunday, November 14, 2010 at 9:32am.

- 9th grade physics needs help -
**PsyDAG**, Sunday, November 14, 2010 at 9:38amIndicate your subject in the "School Subject" box, so those with expertise in the area will respond to the question

- 9th grade -
**Damon**, Sunday, November 14, 2010 at 10:07amWhat is its initial vertical speed Vo ?

v = Vo - 9.8 t

v = 0 at top

so

t = Vo/9.8

then height

h = Vo t - (9.8/2) t^2

100 = Vo^2/9.8 - (9.8/2) (Vo/9.8)^2

100 = Vo^2/(2*9.8)

Vo = 44.3 = speed sin theta

sin theta = 44.3/50

theta = 62.4 deg up from horizontal

**Answer this Question**

**Related Questions**

physics - A stone propelled from a catapult with a speed of 50m/s attains a ...

PHYSICS - A stone propelled from a catapult with a speed of 50m/s attains a ...

Physics - A stone popelled from a catalpult with the speed of 50m/s attained a ...

Physics - A ball is thrown with a speed of 100m/s attains a height of 150m....

physics - Venus is a grade 12 learner and she claims that she can shoot a stone ...

physics - A stone is projected upward at an angle of 60degree to the horizontal ...

physics - A stone is projected upward at an angle of 60degree to the horizontal ...

PHYYYYYSICS - A catapult launches a stone at an angle of 20° above the ...

Physics - A catapult on a cliff launches a large round rock towards a ship on ...

applied physics - you are standing on a 100m tall buiding above a street and ...