AP EAMCET20225 Jul 2022Evening ShiftPhysicsWork, Power and EnergyActual
A force F =4 i -15 j N , acts on a body resulting in a displacement of 6 i . If the body had a kinetic energy of 7 joules at the beginning of the displacement, the kinetic energy at the end of the displacement is
Options
- A24 ~J
- B31 ~J
- C30 ~J
- D25 ~J
Correct answer
B. 31 ~J
Step-by-step solution
Work done = F S aligned & K = F S & K _ f -7=(4 i -15 j ) (6 i ) K _ f -7=24 K _ f =31 ~J aligned