Posted by **Jess** on Tuesday, October 16, 2007 at 7:41pm.

please check my answers.

17. explain how the sport of pole vaulting dramatically changed when flexible fiberglass poles replaced still wodden poles?

-the fiberglass poles had more momentum and PE than still wooden poles?

20. does the international space station have gravitational pe? ke? explain?

-It has gravitation pe, but I am stuck as to why?

25. what does the work theorem say about the speed of a satillite in circular orbit? (this one I dont understand)

30.a moving hammer hits a nail and drives it into a wall. if the hammer hits the nail with twice the speed, how much deeper will the nail be driven? if it hits with three times the speed?

-would it be three times the speed

- physics problems -
**bobpursley**, Tuesday, October 16, 2007 at 7:54pm
no, yes but why, no , no

fiberglass poles can store energy (from horizontal velocity) and transfer it upward.

Gravational PE occurs when two bodies are separated, right?

The satellite in orbit uses no energy.

work = velocity^2

force*distance=velocity^2

distance is proportional to velocity^2

so what is twice square?

## Answer this Question

## Related Questions

- Magnets-Physics - I have a few questions that I am not too sure of. why is it ...
- math - On the side of a parade ground there are two flag poles. The first is 11m...
- Algebra - A wire is run between two tips of two poles. One pole is 23 ft. taller...
- Science - Physical - Earth's magnetic field induces some degree of magnetism in ...
- geometry - Two poles, 60 feet tall and 20 feet tall, stand on opposite sides of ...
- Physics - A 980-N painter stands on a uniform 230-N board supported by 2 wooden ...
- algebra - dan has 6 worms on each pole and gary has 11 worms on each pole there ...
- science - Amanda is holding a compass and notices that the north pole of the ...
- PRE ALGEBRA - solution to electrical poles that carry electrical wire seem to ...
- physics - why does the earth have a magnetic declination? a. the earth's axis of...

More Related Questions