Sunday

February 1, 2015

February 1, 2015

Posted by **tommy** on Tuesday, September 7, 2010 at 1:45pm.

A- I solved for t=2.63

B-How far will it land from the base of the cliff?

im using x=xo+vox*t

i get -6.46 and it is wrong. What am I doing wrong?

C-What is the velocity (magnitude and direction counterclockwise from the +x-axis, which is the initial horizontal direction in which the rock was thrown) of the rock just before it hits the ground?

Magnitude m/s

Direction °

what would i use for a formula?

- physics -
**drwls**, Tuesday, September 7, 2010 at 1:55pmYour time is correct, but they want the horizontal distance from the base opf the cliff. How can that be negative?

X = 17 m/s*2.63 = 44.8 m

Your formula for x is crrect, but xo = 0 and I don't see how you came up with -6.46.

For the speed when it hits the ground, you can use conservation of energy.

[Vfinal^2 - Vinitial^2]/2 = g H

For the direction,

Vinitial/Vfinal = cos^-1 theta

Vinitial = Vx (during flight)= 17 m/s

**Answer this Question**

**Related Questions**

physics - a rock is thrown horizontally with a speed of 17 m/s from a vertical ...

physics..help PLEASE! - A 0.26 kg rock is thrown vertically upward from the top ...

physics - c) A 0.26-kg rock is thrown vertically upward from the top of a cliff ...

physics - A rock is thrown from a cliff top at 18m/s, 25 degrees above the ...

physics - A 0.26 kg rock is thrown vertically upward from the top of a cliff ...

PHYSICS - A 0.26kg- rock is thrown vertically upward from the top of a cliff ...

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 ...

Physics - A rock is thrown horizontally off of a cliff. It starts with a ...

Physics - A 0.26 kg rock is thrown vertically upward from the top of a cliff ...