Explanation
Step 1
The potential energy of a body is due to its mass, the height at which it is, and the acceleration due to gravity.
it is given by the expression:
[tex]PE=mgh[/tex]hence
at top
[tex]\begin{gathered} PE=maximum \\ KE=0 \end{gathered}[/tex]at b
[tex]\begin{gathered} PE=0 \\ KE=\left(maximum\right) \end{gathered}[/tex]so, as the potential energy depends on on the heigth, the maximum potential energy is when he is on top(A)
Kinetic energy is a form of energy that an object or a particle has by reason of its motion.
[tex]KE=\frac{1}{2}mv^2[/tex]As the snowboarder loses height, he gains speed, so all the potential energy is converted into kinetic energy, a little energy is lost due to the friction of the wind and the friction of the board with the snow (although it is minimal).
I hope this helps you
