(adsbygoogle = window.adsbygoogle || []).push({}); 1) If a man lifts a 11.0 kg bucket from a well and does 7.00 kJ of work, how deep is the well? Assume that the speed of the bucket remains constant as it is lifted.

2) Hooke's law describes a certain light spring of unstretched length 36.0 cm. When one end is attached to the top of a door frame, and a 7.60-kg object is hung from the other end, the length of the spring is 45.50 cm.

(a) Find its spring constant.

(b) The load and the spring are taken down. Two people pull in opposite directions on the ends of the spring, each with a force of 170 N. Find the length of the spring in this situation.

work=fd

PE=(1/2)k(x^2)

ok for the first one i did 7000J/11= 636.36 and it says that's wrong

and for the second one im not even sure where to start

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Work and spring constant questions?

**Physics Forums | Science Articles, Homework Help, Discussion**