Posted by **Danielle** on Tuesday, April 1, 2008 at 1:17am.

I need help with this questions.

a). An overhead garage door has two springs, one on each side of the door. A force of 15 pounds is required to stretch each spring 1 foot. Because of a pulley system, the springs stretch only one-half the distance the door travels. The door moves a total of 8 feet, and the springs are at their natural length when the door is open. Find the combined lifting force applied to the door by the springs when the door is closed.

## Answer This Question

## Related Questions

- Physics - A thief is trying to escape from a parking garage after completing a ...
- Physics - The force required to stretch a spring varies directly with the amount...
- physics - A thief is trying to escape from a parking garage after completing a ...
- Math Problem (please help) - Use Hooke's Law for springs, which states that the ...
- Physics - A thief is trying to escape from a parking garage after completing a ...
- physics - To leave Nicholson, you exit via the door to the quad. The door is 40 ...
- Algebra!!!! HELP - Use Hooke's Law for springs, which states that the distance a...
- pre calculus - Use Hooke's Law for springs, which states that the distance a ...
- math - A planned community has 300 homes, each with an automatic garage door ...
- physiC - A uniform door (0.81 m wide and 2.1 m high) weighs 150 N and is hung on...

More Related Questions