railway RRB Technician Grade 1 Mock Test 2024 Physics Work Power and Energy Conservation of Mechanical Energy
A force F = Py2 + Qy + R acts on a body in the y direction. The change in kinetic energy of the body during a displacement from y = -a to y = a is-
1
\(\frac{2Pa^3}{3} + 2Ra\)
2
\(\frac{2Qa^2}{3} + Pa\)
3
\(\frac{2Pa^2}{3} + \frac{Ra}{2}\)
4
\(\frac{2Pa^2}{3} + \frac{Qa}{2}\)