NEET2007PhysicsWork, Power and EnergyActual
A vertical spring with force constant k is fixed on a table. A ball of mass m at a height h above the free upper end of the spring falls vertically on the spring so that the spring is compressed by a distance d . The net work done in the process is
Options
- Am g(h+d)- 1 2 k d^2
- Bm g(h-d)- 1 2 k d^2
- Cm g(h-d)+ 1 2 k d^2
- Dm g(h+d)+ 1 2 k d^2
Correct answer
A. m g(h+d)- 1 2 k d^2
Step-by-step solution
Net work done = work done by gravitational force + work done by spring force =m g(h+d)- 1 2 k d^2