Work

[joshua89]

Suppose that 4 J of work is needed to stretch a spring from its natural length of 28 cm to a length of 37 cm.
(a) How much work is needed to stretch the spring from 30 cm to 32 cm? (Round your answer to two decimals)
_______J

(b) How far beyond its natural length will a force of 50 N keep the spring stretched? (Round your answer one decimal place.)
_______cm

I keep getting a very small .00267J
and sqrt(45/2) cm

 

[Deleted member 4993]

Suppose that 4 J of work is needed to stretch a spring from its natural length of 28 cm to a length of 37 cm.
(a) How much work is needed to stretch the spring from 30 cm to 32 cm? (Round your answer to two decimals)
_______J

(b) How far beyond its natural length will a force of 50 N keep the spring stretched? (Round your answer one decimal place.)
_______cm

I keep getting a very small .00267J
and sqrt(45/2) cm

What equation did you use?

Please share your work - so that we can catch any mistakethat might be present.

 

[HallsofIvy]

Perhaps you accidently went into the wrong class room and were given homework for a class you aren't taking?

If you are taking this class then your teacher clearly expects you to know the physics definition of "work" and how work is related to force and the distance over which that force is applied. What is that relation?