A spring requires a force of 25 N to produce an extension of 2 cm in it. What is the work done in further extending it by 3 cm.
A. 1.3125 J
B. 1.876 J
C. 2.7121 J
D. 2.85 J

Question

A spring requires a force of 25 N to produce an extension of 2 cm in it. What is the work done in further extending it by 3 cm.
A. 1.3125 J 
B. 1.876 J 
C. 2.7121 J 
D. 2.85 J

anonymous · Answer

@asmagul can you help me plz

anonymous · Answer

if we know the elastic modulus of spring we can find work done by this formula  W=1/2*EAl1[square]/L

whpalmer4 · Answer

F = -kx 
find k from the force needed to extend the spring 2 cm.

To find the work done to further extend it, W = F * d where d is the further extension, and F is the force due to the spring.

souvik · Answer

1.3125 J

anonymous · Answer

Thank you guys for the help i got a 100 on my test :)