Saturday

February 28, 2015

February 28, 2015

Posted by **Nicole** on Thursday, March 15, 2012 at 12:21pm.

(a) With what speed did you throw the rock?

(b) How far away from the bridge horizontally did the rock land?

- physics -
**bobpursley**, Thursday, March 15, 2012 at 12:24pmsixty degres measured how?

- physics -
**Nicole**, Thursday, March 15, 2012 at 12:29pmMeasured to the horizontal

Throw*

- physics -
**bobpursley**, Thursday, March 15, 2012 at 12:37pmThen the vertical velocity initial is Vsin60.

At the top, vertical velocity is zero.

Vtop=Vivertial-gt

so time to top= Vivertial/g=Vsin60 /g

then solve for V

Now how far: You have to find vertical time in air.

hf=hi+Vivertical*t-1/2 g t^2

0=23+Vsin60* t-1/2 g t^2

solve for t, time in air. Use the quadratic formula.

Now distance: distance= Vhoriz*timeinair

where vhoriz= Vcos60

**Answer this Question**

**Related Questions**

Physics - A person drops a small rock from a bridge. If it takes 1.70 seconds ...

physics - a boy stands on a cliff overlooking a lake below. He throws a rock at ...

Physics - A rock is thrown off a bridge at an angle of 38degree above horizontal...

physics - A rock thrown horizontally from a bridge hits the water below 30 ...

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

physics - On Earth a rock falls an unknown vertical distance from a resting ...

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

Physics - A rock is dropped from a bridge to the water below. It takes 2.40 s ...

physics - A rock is dropped off of a bridge into the water below. If the ...

Physics - A rock thrown from a bridge hits hte water below at a horizontal ...