Show:
Potential
Kinetic
Energy
Transformations
Problems
100
Stored Energy
What is potential energy?
100
What is kinetic energy?
energy in motion
100
What is thermal energy?
heat is thermal energy it can be transferred from one place by one place to another
100

What is the energy transformation of a burning candle?

Chemical->Thermal

100

A 10-N force is exerted on a box, moving it 20 m in the same direction. What is the magnitude of work done on the box?  

200 J

200
What is an example of Potential Energy?
Roller Coaster sitting on top of a hill
200
What is an example of kinetic energy?
a car rolling down a hill
200

What is the difference between potential and kinetic?

Potential energy is energy waiting to go into motion. Kinetic energy is energy in motion.

200

What is the energy transformation in a flashlight?

Chemical->Electrical->Heat and Light

200

How much work is done when a person picks up for 4.7 m a 7.7 N back pack from the floor?

36.19 J
300

Calculate the potential energy of 8 kg ball suspended 5 m above ground.

392 J

300

What two things affect kinetic energy?

Mass how heavy an object is. Velocity how fast an object moves.

300
which law states that energy cannot be created or destroyed?
law of energy of conservation
300

What is the energy transformation in a windmill?

Kinetic->Electrical and Mechanical

300

If a powerlifter raises a 1,000 N weight a distance of 2.0 meters in 0.5 seconds, what is his power output?

4,000 W

400

What is the potential energy of 47 kg boy that is standing on the top of the diving board that is 7.5 m high.

3,454.5 J

400

How much kinetic energy does a 200 kg cart have when going 40 m/s?

160,000 J

400
What is why can energy only flow from hot to cold and not the other way around?
you can only take heat away
400

Which of the following is the best example of kinetic energy being transformed into potential energy? 

A. A ball rolling up a hill

B. Bending a paper clip  

C. Coasting down a hill on a bicycle

A. A ball rolling up a hill

400

Conveyor belts are often used to move packages around warehouses. The conveyor shown below moves packages at a steady 4.0 m/s. A 500 N employee decides to catch a ride by sitting on a 1,000 N box for a 50 m trip as shown below. 

What is the work done?

0 J

500
What is how dose a pendulum represent potential energy?
when it goes up it has potential energy
500
What is how does a pendulum represent potential to kinetic energy?
Because when it is at its highest point then it is potential energy and when it rolls down to its lowest point it is kinetic energy.
500
What is how does energy flow when you have ice water and hot chocolate?
hot to cold
500

Which of the following does not contribute to the potential energy of an object? 

A. Mass of the object

B. Height of the object above the Earth's surface 

C. Velocity of the object

C. Velocity of the object

500

A 100 kg gymnast comes to a stop after tumbling. Her feet do 5,000 J of work to stop her.   

Which of the following was the girl's velocity when she began to stop?

10 m/s