Potential Energy
This is how mass is related to gravitational potential energy.
What is directly?
What is the energy of motion?
Work is defined as this.
What is a change in energy?
This is what the law of conservation of energy states.
What is energy cannot be created or destroyed, only transformed?
What is the total energy of a system remains constant unless an outside force does work?
TE = PE + KE = constant
Power lines.
What is electrical energy?
This happens to GPE if height is doubled.
What is doubled?
These are the 2 factors that affect kinetic energy.
What is mass and velocity?
These are the two requirements for work.
What is a force that causes a displacement (the two vectors must be parallel)?
This force converts the potential energy of a falling object into kinetic energy.
What is gravity?
Gravitational potential energy, stored elastic energy, and kinetic energy (motion) are considered this.
What is mechanical energy?
This is the potential energy of a 10 N water bottle sitting 1 m off the ground.
What is 10 J?
This is the kinetic energy of a 2 kg ball traveling at 2 m/s and 4 m off the ground.
What is 4 J?
This is the amount of work done by a 5 N force displacing an object 2 m.
What is 10 J?
This is a measure of how much useful energy a device can produce from a certain amount of input energy.
What is efficiency?
This energy type is present in all energy transformations involving objects in contact or air/liquid molecules.
What is thermal (heat) energy?
This is the place on a roller coaster with the greatest potential energy.
What is the highest point?
If the velocity of an object is tripled, this happens to its kinetic energy.
What is nine times larger?
If the displacement achieved by a force is halved, this happens to the work done.
What is halved?
A roller coaster has 5000 J of PE and 1000 J of KE at the top of a loop. If the roller coaster has 2500 J at the bottom of the loop, how much KE does it have if none is lost due to friction and air resistance?
3500 J
The sun.
What is nuclear, radiant, or thermal?
This is the gravitational potential energy of a 0.018 kg bird on a branch 4.900 m above the ground.
0.882 J
A 0.05 kg hot wheels car on top of a 0.30 m track is at rest and has 0.15 J of potential energy. It slides down the track, losing no energy to friction or air resistance. At the bottom of the track, what is the velocity of the car?
What is 2.45 m/s?
This is the amount of work done by a construction worker carrying a 12 N box 5 m along a horizontal floor.
What is none (0J)?
Given your current understanding of the energy crisis, name 2 ways people can "conserve energy."
What is use energy efficient appliances, use renewable and efficient energy sources, don't waste energy...?
Chewing food.
What is kinetic and elastic potential (mechanical)?