Posted by **Mac** on Sunday, December 17, 2006 at 5:46am.

A stone, which weighs 0.62kg, is thrown, at 5.5ms, its kinetic energy at its maximum height above the surface is 2.3J, what is the height of the stone at this point? Any eqautions or advice gratefully recieved.

I assume that is 5.5 m/s, the initial velocity.

Ok, assuming that, then you know the initial KEnergy; 1/2 .62 (5.5)^2 joules.

At the max height, the KE you are given is KE from horizontal motion. So subtract that amount (2.3J) from the initial KE, and you have then the KE that can go into vertical motion. From that, it is easy:

KE available for vertical motion=PE at top, where PEnergy at the top is mass*g*height and you solve for height.

Excellent, thanks very much

## Answer this Question

## Related Questions

- Physics - A stone is thrown from the edge of a cliff into the ocean below. It is...
- Physics - A stone is thrown from the edge of a cliff into the ocean below. It is...
- physics - A stone with mass m = 2.3 kg is thrown vertically upward into the air ...
- civil engineering - A stone (on the edge of the roof) thrown from the top of a ...
- Physics - A stone is thrown vertically upward. On its way up it passes point A ...
- physics - A stone is thrown vertically upward. On its way up it passes point A ...
- calc - a stone is thrown striaght up from the roof of an 80 foot building. the ...
- Physics - From the edge of the rooftop of a building, a boy throws a stone at an...
- Physics - From the edge of the rooftop of a building, a boy throws a stone at an...
- Physics - From the top of a cliff with 80 m height a stone is thrown vertically...

More Related Questions