Question

A car and truck have the same speed of 30 ms-1.If their masses are in the ratio of 1 is to 3 find the ratio of their Kinetic energies .




solve it with proper explanation ​

Answer 1

_______ ♛ Be BrAiNly ♛_______

Answer 2

Answer:Let the mass of car be x and of truck be 3x.

             so, the kinetic energy of car is 1/2*m(v^2)

                                                     i.e 1/2 *x(30*30)

               now, the kinetic energy of truck is 1/2*3m(v^2)

                                                     i.e 1/2*3x(30*30)

                     ratio= kinetic energy of car/kinetic energy of truck

                                          now, ratio is  of kinetic energy of car to that of truck is 1/3 i.e 1:3