Posted by **stacy** on Thursday, February 17, 2011 at 8:09pm.

A rock is thrown from a cliff top at 18m/s, 25 degrees above the horizontal. It lands on the beach 4.2 seconds later.

a) What is the height of the cliff?

b) Hor far from the base of the cliff did the rock land?

- physics -
**bobpursley**, Thursday, February 17, 2011 at 8:10pm
vertical veloctiy: 18sin25

Hf=hi+viv*t-1/2 g t^2

hf=0, hi=unknown,viv=18sin25, t=4.2 solve for hi.

horizontal distance? 18cos25*4.2

- physics -
**stacy**, Thursday, February 17, 2011 at 8:13pm
great, thank you so much!

## Answer this Question

## Related Questions

- Physics - A stone is thrown at an angle of 30 degrees above the horizontal from ...
- Physics - A stone is thrown at an angle of 30 degrees above the horizontal from ...
- physics - A rock is thrown vertically upward from the edge of a cliff. The rock ...
- physics - A rock is thrown vertically upward from the edge of a cliff. The rock ...
- Tulane Physics - a rock is thrown unward off a cliff at a 45 degree angle. THe ...
- Physics - A ball is thrown toward a cliff of height h with a speed of 27m/s and ...
- physics - A boy sitting on the edge of a vertical cliff fires a rock with a ...
- Physics 124 - A projectile is fired from the top of a cliff at 14.2 m/s at an ...
- Physics - The rock reaches a maximum height of 20.4 m above the top of the cliff...
- physic - A ball is thrown toward a cliff of height h with a speed of 28m/s and ...