calc/physics
posted by Mischa
A force of 250 N is required to stretch a spring 5m from rest. Using Hooke's law, F=kx, how much work, in joules, is required to stretch the spring 7m from rest?
The energy required scales with x^2.
Multiply 250 J by (7/5)^2.

derek
350 J
Respond to this Question
Similar Questions

PHYSICS
If it takes 4.12 J of work to stretch a Hooke's law spring 12.1 cm from its unstressed length, determine the extra work required to stretch it an additional 10.0 cm. 
physics
The force required to stretch a Hooke’slaw spring varies from 0 N to 62.4 N as we stretch the spring by moving one end 17.2 cm from its unstressed position. a) Find the force constant of the spring. Answer in units of N/m b) Find … 
Physics (2)
If it takes 4.00 J of work to stretch a Hooke's Law spring 10.0 cm from its unstressed length, determine the extra work required to stretch it an additional 10.0 cm 
science
It takes 3.38 J of work to stretch a Hooke’slaw spring 5.63 cm from its unstressed length. How much the extra work is required to stretch it an additional 4.22 cm? 
Physics
The force required to stretch a Hooke’slaw spring varies from 0 N to 70.4 N as we stretch the spring by moving one end 5.35 cm from its unstressed position. Find the force constant of the spring. Answer in units of N/m 
Physical Science
An exercise spring has a spring constant of 315 N/m. How much work is required to stretch the spring 30 cm? 
physics
The force required to stretch a Hooke’slaw spring varies from 0 N to 68.1 N as we stretch the spring by moving one end 16.2 cm from its unstressed position. Find the work done in stretching the spring 
Physics
The force required to stretch a Hooke’slaw spring varies from 0 N to 63.5 N as we stretch the spring by moving one end 5.31 cm from its unstressed position. Find the force constant of the spring. Answer in units of N/m 
Physics
Hooke's law states that it takes a force equal to kΔx is required to stretch a sorting a distance Δx beyond its rest length. A) determine a formula in terms of k & Δx that represents the amount of work required to stretch … 
Physics
The force required to stretch a spring varies directly with the amount the spring is stretched. A force of 29 pounds is needed to stretch a spring 39 inches. How much force is required to stretch the spring 27 inches?