A2kg mass compresses a spring 1.2m. if the object has 160 j of energy, calculate the spring constant of the spring.

no answer

Explanation:

1.2(m)*k(N/m)=2g(mass)(g=9.8m/s^2)

k≈16.33

but

E=1/2*k*(∆L)^2

k≈222.22

what a paradox！

there must something wrong～

what kind of energy it is included?

includes gravity potential energy?spring potential energy?

Spring constant = K = 222.22 N/m

Explanation:

Mass = m = 2 kg  

Compressed distance = x = 1.2 m  

Elastic potential energy = E = 160 J  

Spring constant = K = ?

We know that:

              E = (1/2)Kx^2

              K = 2E/x^2

              K = (2)(160)/1.2^2

              K = 222.22 N/m

Hence, the value of the spring constant will be 222.22 N/m.