Question

Two part question need help with homework1.)What can you say about snowboards kinetic energy as he jumps off a rail? What can you say about the potential energy of the snowboarder? Based on your observations what can you say about your prediction above concerning the potential and kinetic energy?

Answer 1

Step-by-step 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:

`PE=mgh`

hence

at top

`\begin{gathered} PE=maximum \\ KE=0 \end{gathered}`

at b

`\begin{gathered} PE=0 \\ KE=\left(maximum\right) \end{gathered}`

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.

`KE=(1)/(2)mv^2`

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