Question

It the same child has a velocity of 2 m/s half-way down the slide, what is his kinetic energy?

Answer 1

`(1)/(2) * m * {v}^(2) \\ (1)/(2) * m * {2}^(2) \\ 2 * m`

I dont the child mass...you should substitute that value to (m)

then you can get your answer