Question

8. A person moves a mass Exam 3 (cont.) S a mass m connected to a massless ideal spring between the two positions shown in the diagramata agram at a constant velocity, starting at position A (t = +d), and ending af ition B -d), where represents the equilibrium position of the uilibrium position of the mass and spring ystem. What is the network done by the person in this process? 4 of 12 2kd 2kd Position A Position B A massless bridge of length L is supported on both ends. A car of third of the way across the bridge. A sensor on the lo F = 4000 N. (The diagram correctly magnitudes.) What man x=+d F = 4000 x=0 ay across the bridee pported on both ends. A

Answer 1

Que ® son we know spring mass that system work = in done I kv 2 a I ke 2 Here x= d-(-d) = Rd Whet = £ k (dd)² = qkd? - Qkd² Open 0 is correct,