- #1
MomentumBJ
- 2
- 1
- Homework Statement
- In this problem, a block that slides over an inclined plane reaches a spring at the bottom and compresses it.
- Relevant Equations
- In the energy balance T1 + V1 = T2 + V2, where:
T1 = (1/2)m*v1^2
V1g = m*g*h1
V1e = k*e1^2 = (1/2)*(30x10^3)( 0.050 )^2 = 37.5 J <--- compressed spring
T2 = (1/2)m*v2^2
V2g = mgh2
V2e = (1/2)*k*e2^2 =(1/2)*(30x10^3)(0.050 +x )^2 = 37.5 +1500*x + 15000*x^2
^----- again compressed
Thanks !
In the initial position the spring is previously compressed, then the block adds a force, and the spring is again deformed. I think the energy balance is incorrect; the potential energy of the spring is repeated.