Springs
^Springs 1. Spring force does -ve work when we expand or stretch & +ve work when the spring force restores […]
Entries by kp-web-admin
Work energy theorem
^Work energy theorem Total work done by all the forces acting on a system between any two points is equal […]
Conservation of mechanical energy
^Conservation of mechanical energy K + U = E = constant […]
Work by a conservative force
^Work by a conservative force Work done by a conservative force in moving a body from one point say ‘A’ […]
^Potential energy
^Potential energy Potential energy is defined only for conservative forces. Gravitation, electromagnetic, spring force all are conservative. Friction is non […]
^Kinetic energy
^Kinetic energy Kinetic means motion. A mass ‘m’ moving at As both m & v2 are + ve & scalar, […]
^Work to pull a chain
^Work to pull a chain A chain is held on a frictionless table with 1/n of its length hanging over […]
^Calculating work from F – x graph
^Calculating work from F – x graph is read as work done by a force ‘Fx’ in moving an object […]
^Examples of zero, +ve & -ve work
^Examples of zero, +ve & -ve work Zero work means either no displacement of system no net change in the […]
^Sign of work
^Sign of work Sign of work depends on sign of cosθ. As cosθ can be 0, +ve or – ve […]
