question_answer

The force \[\overset{\to }{\mathop{F}}\,=F\hat{i}\] on a particle of mass 2 kg, moving along the x-axis is given in the figure as a function of its position x. The particle is moving with a velocity of 5 m/s along the x-axis at x = 0. What is the kinetic energy of the particle at\[x=8m?\]   JEE Main Online Paper (Held On 26-May-2012)  

A) 34J                                         

B)                        34.5 J

C)                        4.5J                                       

D)                        29.4J