Skate Park PhET Part One

Kinetic energy is the energy an object has due to ___.

• its motion

• its position relative to its surroundings

Potential energy is the energy an object has due to ___.

• its motion

• its position relative to its surroundings

Look at the two pictures below. Select the picture that shows the greatest amount of potential energy.

• 
• 

As the skater goes down the halfpipe from the left to the right, select from the following the best description of energy.

• Potential energy is decreasing and kinetic energy is decreasing

• Potential energy is increasing and kinetic energy is decreasing

• Potential energy is increasing and kinetic energy is increasing

• Potential energy is decreasing and kinetic energy is increasing

What is the potential energy of the skater in this picture?

• 100 Joules

• 10 Joules

• 1 Joule

• 0 Joules

If the skater in the picture started at 5 m high on the halfpipe, what percentage of the total energy of the skater is kinetic energy at this point in the picture?

• 100%

• 75%

• 50%

• 25%

If the skater started from rest at 4 m high and 100 Joules of potential energy, how much kinetic energy does the skater have in this picture?

• 100 Joules

• 50 Joules

• 0 Joules

• Not enough information to answer