Saturday

January 31, 2015

January 31, 2015

Posted by **Morgan** on Tuesday, September 19, 2006 at 4:47pm.

In how many seconds after being thrown does the rock strike the ground?

What is the speed of the rock just before it strikes the ground?

The position of the rock is

s = (-1/2)g*t^2 + (12m/s)*t + 40

Use the quadratic formula to find t when s = 0

The speed is |-g*t + 12| those are absolute value bars and the t from the first part.

Check my set-up for this.

**Answer this Question**

**Related Questions**

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

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

Physics - A rock is thrown vertically upward with a speed of 11.0 from the roof ...

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

physics - In the problem, please assume the free-fall acceleration g = 9.80 m/s2...

physics - In the problem, please assume the free-fall acceleration g = 9.80 m/...

physics - One side of the roof of a building slopes up at 30.5°. A roofer kicks ...

physics - One side of the roof of a building slopes up at 30.5°. A roofer kicks ...

physics - One side of the roof of a building slopes up at 30.5°. A roofer kicks ...

Physics - A small rock is thrown vertically upward with a speed of 14.0m/s from ...