1. A spring has a natural length of 10 in. An 800-lb force stretches the spring to 14 in.
(a) Find the force constant.
(b) How much work is done in stretching the spring from 10 in. to 12 in.?
(c) How far beyond its natural length will a 1600-lb force stretch the spring

Question

1. A spring has a natural length of 10 in. An 800-lb force stretches the spring to 14 in.
(a) Find the force constant.
(b) How much work is done in stretching the spring from 10 in. to 12 in.?
(c) How far beyond its natural length will a 1600-lb force stretch the spring

anonymous · Answer

a) Solve the following equation for k$$F_s = k x$$
b) Solve the following expression. $$W_s = {1 \over 2} k \Delta x^2$$
c) Solve the following equation for x $$F = kx$$

anonymous · Answer

I got 200 for K

400 for part B

and 6" past natural lengnth fo C.

anonymous · Answer

A and B are right. 

Double check your value for C.

anonymous · Answer

If a force of 800 lb produces a deflection of 4 inches, what should be the deflection if we double the force?