Phet Energy Skatepark

Kinetic energy is energy that is ​ ​ ​ (a)  

• stored

• destroyed

• created

• moving

A 20 kg object is sitting on top of a table that is 1.3 m high. What type of energy does it have?

• kinetic

• potential

• chemical

• electrical

At which point along the track will the skater have the most potential energy?

• A only

• F only

• Both A and F

• C only

At which point along the track will the skater have the most kinetic energy?

• A only

• F only

• A and F only

• C only

What does gravitational potential energy depend on?

• height

• mass

• gravity

• all of these

At which point on the track does the graph correspond to?

• Point A

• Point B

• Point C

If a skater starts at point A with v_i=0m/s. which statement is true?

Assume Friction is zero

• At Point A E_total=E_ga

• E_gb=0

• The skater is fastest at Point B

What does kinetic energy depend on?

• Mass and Velocity

• Height

• Height and Mass

 Do you think the Skater will make it over the first hump?
(No friction on the track)

• No, because his potential energy will be converted to thermal energy
• No, because he doesn’t have enough potential energy
• Yes, because all of his potential energy will be converted to kinetic energy
• Yes, because some of his energy will be potential and some kinetic

If the skater is moving down the pipe, in the next moment, the _ will increase (no friction)

• E_k

• E_g

• E_total