KE & PE quiz
A girl is riding her bike at a speed of 12 m/s. She weighs 55 kg and her bike weighs 22 kg. What is the KE of the girl and her bike?
5544 J
A remote control toy boat has a kinetic energy of 750 J. It's mass is 400 grams. How fast is it traveling?
61.23m/s
Draw a marble on a track with low kinetic energy.
Example on study guide in google classroom
Draw a marble on a track with low potential energy.
Example on study guide in google classroom
What are the two things that affect the kinetic energy of an object?
-mass (how big it is) -velocity (how fast it's going)
A sky diver is preparing to jump out of a plane that is flying at a height of 2200 m. If the sky diver has a mass of 78 kg, what is her PE?
1,681,680 J
A paper airplane flies through the air at a speed of 16 m/s. The paper airplane has a mass of 0.34 kg. What is its KE?
43.52 J
The velocity of a car is 65 m/s and its mass is 2515 kg. What is its KE?
5,312,937.5 J
A tree was hit by a storm and is falling down a hill that is 3.2 meters off the ground. Its potential energy is 325 joules. What is the mass of the tree?
10.36 kg
If a 30 kg child were running at a rate of 9.9 m/s, what is his KE?
1470.15 J
A 6.57 kg ball rolls across the street at a rate of 7 m/s. What is the KE of the ball before it hits the curb?
160.97 J
The boulder in problem 10 begins to fall. What is its PE when it reaches 75 m above the ground?
3,536,820 J
A boy stands on a high-dive that is 4.8 m tall. If the boy has a mass of 66 kg, what is his PE?
3104.6 J
A brick is suspended above the ground at a height of 6.6 m. It has a mass of 5.3 kg. What is the PE of the brick?
342.8 J
A 9800 kg plane is traveling at a rate of 400 m/s. What is the KE of the plane?
784,000,000 J
A 4812 kg boulder sits on top of a 203 m cliff. What is its PE?
9,572,992.8 J
What does the law of conservation of energy say?
Energy is not created or destroyed
What is the definition of Kinetic Energy?
Energy of motion
Draw a marble on a track that has high potential energy.
Example on study guide in google classroom
Draw a marble on a track with high kinetic energy
Example on study guide in google classroom
How are work and kinetic energy related?
For work to be done, there must be energy. Potential energy is the stored energy that something needs to begin work.
Identify the 5 types of potential energy and give an example of each.
Gravitational- a ball being held in the air Electric- static electricity not yet used Elastic (Mechanical)- rubber band stretched Chemical- battery Nuclear- nuclear power plant
Give an example of something with a high amount kinetic energy.
High speed train
What is the formula for kinetic energy?
KE= ½mv2
Describe what happens to kinetic energy when potential energy increases.
Kinetic energy decreases as potential energy increases and vice versa
Identify the 5 types of kinetic energy and give an example of each.
Radiant- electromagnetic energy that moves in waves- example. Sunlight, visible light Sound- movement through longitudinal waves caused by vibration Electrical- flow of charged particles like lightning Thermal- toaster or heater Motion- anything that moves like wind and waves
Write a scientific explanation as to which platform would have the most potential energy for a diver. You should include a claim, evidence and justification using the information given in the image below - Image on google classroom.
Sample Claim: The 10 m platform would provide the greatest potential energy to the diver. Sample Evidence: The 1 m springboard is the closest to the pool surface. The 3 m springboard is in between the 1 m and 10 m platforms. The 10 m platform has the greatest distance from the pool surface. Sample Reasoning: Objects gain stored potential energy as distance increases from the center of the Earth (point of reference)
Give an example of something with low kinetic energy.
Snail or sloth
What is the definition of potential energy?
Stored energy
Rank the following in order of most potential energy to least potential energy. ___ A person standing on top of a desk ___ A person standing on the top of a building ___ A person standing on the floor
_2__ A person standing on top of a desk _1__ A person standing on the top of a building _3__ A person standing on the floor
What is the PE of the boulder as it smashes into the ground?
zero J