A question from my textbook is stated below
In an elastic collision
- The initial kinetic energy is equal to the final kinetic energy
- The final kinetic energy is less than the initial kinetic energy
- The kinetic energy remains constant
- The kinetic energy first increases then decreases
Given answer is option 1.
I know that there is no loss of energy in elastic collision, so option 1 is correct but as far as I see option 3 which states them same fact as 1 should also be correct.
So is option 3 also correct or something I am missing out?
Please help and thanks for help in advance!!!