Help
Options
Question
Energy has the ability to ___________ ?
click to flip
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't know
Question
What 2 factors determine how much kinetic energy an object has?
Remaining cards (93)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Chapter 4 & 5
DHS PS CH 4/5 - Work, Energy, & Power (online course)
| Question | Answer |
|---|---|
| Energy has the ability to ___________ ? | cause change |
| What 2 factors determine how much kinetic energy an object has? | speed and mass |
| A glass sitting on the edge of a table is an example of what kind of energy? | potential or GPE |
| A ball rolling across the floor is an example of what kind of energy? | kinetic |
| Energy stored in chemical bonds is? | chemical potential energy |
| What two factors determine how much gravitational potential energy is in an object? | weight (mass x gravity) of the object and height above the ground |
| Energy in the form of motion is what kind of energy? | kinetic |
| What is the formula for calculating kinetic energy? | 1/2mv2 |
| What is the SI unit used to measure energy? | Joule |
| What is the abbreviation for Joules? | J |
| Energy stored in a motionless object | potential |
| Energy stored by things that stretch or compress is what kind of energy? | elastic potential energy |
| Energy stored in chemical bonds between atoms is what kind of energy? | chemical potential energy |
| Energy stored by things that are above Earth's surface is what kind of energy? | gravitational potential energy |
| What is the abbreviation for gravitational potential energy? | GPE |
| The amount of GPE an object has depends on what 3 things? | mass, the acceleration due to gravity, and its height above ground |
| What is the formula for calculating GPE? | mgh |
| What kind of energy does food provide for your body? | chemical potential energy |
| As energy transformation occur within a system, the total energy of the system must ________? | remain constant |
| During energy transformations, energy is never? | created or destroyed |
| A baseball is hit into the air with a bat. When does the baseball have the greatest gravitational potential energy? | when it reaches its highest point |
| The law of conservation of energy states that? | energy cannot be created or destroyed |
| In what units are food energy measured in? | calories |
| Both nuclear fusion and fission have what in common? | they convert mass into energy |
| By what process does the Sun produce enough energy to warm Earth? | nuclear fusion |
| Is friction a form of energy? | No |
| Is thermal a form of energy? | Yes |
| Is electrical a form of energy? | Yes |
| Is chemical a form of energy? | Yes |
| Why isn't all the chemical potential energy found in gasoline transformed into mechanical energy? | because of friction |
| What is it called with energy is changing from one form to another? | energy conversions |
| What form of energy does fuels store energy in? | chemical potential energy |
| The total amount of potential and kinetic energy in a system is called? | mechanical energy |
| Energy may change from one form to another, but the total amoung of energy never changes is called? | Law of Conservation of Energy |
| As a swing moves back and forth, its energy continually converts from kinetic to potential and back is an example of? | The Law of Conservation of Energy |
| Friction converts some of the mechanical energy into? | thermal energy |
| When two nuclei are fused together and takes place in the sun it is called? | nuclear fusion |
| Two nuclei are broken apart in? | nuclear fission |
| Energy from food that is stored in your body is used to fuel the processes that keep you alive is what kind of energy? | chemical potential energy |
| What is used to measure how much energy you get from various foods? | calorie |
| Is energy lost when a car burns gasoline? | No, energy is always conserved. When a car burns gasoline, that energy is changed to kinetic energy which makes the car move. |
| What is it called when the transfer of energy that occurs when a force makes an object move? | work |
| Picking up a stack of dishes from the table is an example of? | work |
| When work is done, there is always a ______ __ _______? | transer of energy |
| What is the rate at which work is done? | power |
| Power is measured in? | watts |
| A watt is equal to? | one joule per second |
| What do we call the transer of energy that occurs when a force makes an object move? | work |
| For work to occur, an object must? | move |
| The motion of the object must be in what direction as the applies force on the object? | the same direction |
| Energy is always ___________ from the object doing the work to the object on which the work is done. | transferred |
| Work is done on an object when a ______ is being applied to the object and the object moves. | force |
| When calculating work, work equal force (in newtons) times ______. | distance |
| The amount of work done in a certain amount of time is called? | power |
| A rate at which work is done is called? | power |
| To calculate power, power equal? | work divided by time |
| Power is measured in? | watts |
| How are energy and work related? | Energy is transferred from an object doing work to an object being worked on |
| The kinetic energy of an object increases as its _____ increases. | velocity |
| Increasing the speed of an object _____ its potential energy. | does not affect |
| The SI unit for energy is the? | Joule (J) |
| Does an upright piano make use of electrical energy? | No |
| Does a radio make use of electrical energy? | Yes |
| Does a toaster make use of electrical energy? | Yes |
| Does a digital camera make use of electrical energy? | Yes |
| A bus engine transfers chemical potential energy into _____ so that the bus moves. | kinetic energy |
| In a nuclear fusion reaction, mass is transformed into? | energy |
| According to the law of conservation of energy, the total amount of energy in the universe ______? | remains constant |
| The transfer of energy to a body by the application of force that caused the body to move in the direction of the force is called? | work |
| What is defined as the rate at which work is done? | power |
| At the top of its arc, a thrown ball has ___ potential energy? | maximum |
| As a dropped penny falls toward the ground, _________ energy is converted to _____ energy. | potential, kinetic |
| As a fly ball is hit in the air, ________ energy is converted to ________ energy. | kinetic, potential |
| A dropped tennis ball will not return to its original position because? | some of the mechanical energy is converted to nonmechanical energy |
| The law of conservation of energy states that energy? | cannot be created or destroyed |
| Mechanical energy can change to nonmechanical energy as a result of? | friction |
| What are the units of power? | watts |
| A baseball is hit into the air with a bat. When does the baseball have the greatest kinetic energy? | when it leaves the bat |
| When work is done, there is always a? | transfer of energy |
| If a car quadruples its velocity, how does it affect its KE? | it is 16 times greater |
| If a car doubles its velocity, how does it affect its KE? | it is 4 times greater |
| If a car triples its velocity, how does it affect its KE? | it is 9 times greater |
| If an object doubles its height, how does that affect its GPE | it is doubled |
| How doe the rate at which you climbed the stairs affect your work? | time is not a component of work so it had no effect. |
| How doe the rate at which you climbed the stairs affect your power? | the faster work is completed, the more power is exerted. |
| Where is the kinetic energy the greatest at on a roller coaster | at the bottom of the first hill (it is the lowest point usually) |
| On a roller coaster, can there be any higher point than the first hill? | No, not unless extra energy is added to the system (like the Maverick) |
| Carrying a pumpkin, work or nonwork? | nonwork (force is up while pumpkin does not) |
| Setting a plate down, work or nonwork? | nonwork (force is up while plate goes down) |
| Shutting a door, work or nonwork? | work (force and direction are same) |
| Pulling a wagon, work or nonwork? | work (force and direction are same) |
| A slap shot in hockey, work or nonwork? | nonwork (puck no longer in contact with stick) |
| What is the formula to determine the Power rating of an electrical device? | P = E/t |
| Who is more powerful? Sally does 20 J in 10 s while Jenny does 10 J in 10 s. | Sally is twice as powerful (2 W vs. 1 W) |
Created by:
aubiefan
Popular Physical Science sets