An object moving along horizontal x -direction with kinetic energy 10 J is displaced through x=(3 i ) m by the force F =(-2 i +3 j ) N . The kinetic energy of the object at the end of the displacement x is

Question

Quantrex Academy · Accepted Answer

Correct answer: C. 4 J

Work energy theorem, W_ al = K . E (W_ al = . work done by all forces ) K_f-K_l= F x K_f-10=(-2 i +3 j ) (3 i )K_f-10=-6K_ f =4 ~J

An object moving along horizontal x -direction with kinetic energy 10 J is displaced through x=(3 i ) m by the force F =(-2 i +3 j ) N . The kinetic energy of the object at the end of the displacement x is

Options

Correct answer

Step-by-step solution

More from Work, Power and Energy