EG007002

The motion energy of an object depends on the speed and mass of the object.


EG025001

In order to know which of two objects is moving faster, you need to know the weight (mass) of each object in addition to the motion energy.


EG023002

Both a ball that is thrown and a ball that is dropped have motion energy while they are moving.


EG023003

Both a ball that is thrown and a ball that is dropped have motion energy while they are moving.


EG012002

A ball has more motion energy than a person when the ball is moving and the person is not moving.


EG003002

Two children that have the same mass and are sledding at the same speed have the same amount of motion energy.


EG003003

Two children that have the same mass and are sledding at the same speed have the same amount of motion energy.


EG005003

Increasing the speed of an object increases its motion energy.


EG004004

A car has the most motion energy when it is traveling at the highest speed.


EG001005

For two balls that have the same mass, the ball that is rolling faster has more motion energy.


EG001006

For two balls that have the same mass, the ball that is rolling faster has more motion energy.


EG002002

For two pinecones falling at the same speed, the pinecone with more mass has more motion energy.


EG009003

For two objects that are traveling at the same speed, the object with more motion energy weighs more.


EG078001

When comparing two cars traveling at the same speed, the car that has more motion energy weighs more than the car that has less motion energy.


EG079001

When comparing two runners with different amounts of motion energy, the only way to know which one weighs more is to also know how fast each is running.


EG081001

Two objects that are moving at the same speed must have different masses in order to have different amounts of motion energy.


EG081002

Two objects that are moving at the same speed must have different masses in order to have different amounts of motion energy.


EG007003

The motion energy of an object depends on the speed and mass of the object.


EG092002

The motion energy of an object depends on the speed of the object but not the direction the object is moving.


EG081004

Two objects that are moving at the same speed must have different masses in order to have different amounts of motion energy.


EG081005

Two objects that are moving at the same speed must have different masses in order to have different amounts of motion energy.


EG081006

Two objects that are moving at the same speed must have different masses in order to have different amounts of motion energy.


EG008004

A ball has motion energy only when it is moving.


EG003004

Two children that have the same mass and are sledding at the same speed have the same amount of motion energy.


EG003005

Two children that have the same mass and are sledding at the same speed have the same amount of motion energy.


EG012003

A ball has more motion energy than a person when the ball is moving and the person is not moving.


EG076002

A basket ball has more motion energy than a boy when the ball is moving through the air and the boy is standing still.


EG005004

Increasing the speed of an object increases its motion energy.


EG004005

A car has the most motion energy when it is traveling at the highest speed.


EG001007

For two balls that have the same mass, the ball that is rolling faster has more motion energy.


EG001008

For two balls that have the same mass, the ball that is rolling faster has more motion energy.


EG011003

For two children who are sledding down a hill and weigh the same, the child who is going faster has more motion energy.


EG010004

For two objects that weigh the same, the object with more motion energy is moving faster.


EG077002

When comparing two identical cars, the car that has more motion energy is moving faster than the car that has less motion energy.


EG002003

For two pinecones falling at the same speed, the pinecone with more mass has more motion energy.


EG006006

When a person is riding a bike, the person has more motion energy than the bike because the person weighs more than the bike.


EG009004

For two objects that are traveling at the same speed, the object with more motion energy weighs more.


EG078002

When comparing two cars traveling at the same speed, the car that has more motion energy weighs more than the car that has less motion energy.


EG025002

In order to know which of two objects is moving faster, you need to know the weight (mass) of each object in addition to the motion energy.


EG080002

When comparing two bike riders with different amounts of motion energy, the only way to know which one is riding faster is to also know the weight (mass) of each.


EG024002

In order to know which of two objects weighs more, you need to know the speed of each object in addition to the motion energy.


EG079002

When comparing two runners with different amounts of motion energy, the only way to know which one weighs more is to also know how fast each is running.


RG001004

Doubling the speed would have the bigger impact on increasing the kinetic energy (motion energy) of a moving object because kinetic energy increases with the square of the speed


RG002003

Kinetic energy is proportional to mass, so when a moving object has its mass decreased by half the kinetic energy of that object decreases by half.


RG003003

Kinetic energy is proportional to the speed squared, so when a moving object has its speed increased by two the kinetic energy of that object increases by four.


RG081002

Kinetic energy is proportional to mass, so when a moving object has its mass increased by two the kinetic energy of that object increases by two.


RG082002

Kinetic energy is proportional to the speed squared, so when a moving object has its speed decreased by half the kinetic energy of that object decreased by one fourth.


RG174001

Kinetic energy is proportional to mass, so when a moving object has its mass increased by two the kinetic energy of that object increases by two. (Item uses bar graphs.)


RG175001

Kinetic energy is proportional to the speed squared. (Item uses line graphs.)


RG176001

Kinetic energy is proportional to mass, so when a moving object has its mass increased by two the kinetic energy of that object increases by two.


RG177001

When a girl and skateboard move at the same speed, the girl has more kinetic energy because the she weighs more than the skateboard.


RG113002

As two oppositely charged object move closer to each other, the electrostatic potential energy of the system decreases, and the kinetic energy of the moving object increases.


RG116002

The electrostatic potential energy of the system of two positively charged objects decreases as the distance between then increases, and the kinetic energy of the moving particle increases and the distance increases..


RG122002

As two oppositely charge particles move closer together, the potential energy decreases, and the kinetic energy increases.


NG002004

An inflated balloon flying around the room as the air leaves the balloon involves the transformation of elastic energy to motion energy.


NG021003

When a hockey puck that is sliding along a level floor hits a wall, motion energy and elastic energy are involved in an energy transformation while the puck is in contact with the wall.


NG049004

When a spring is used to shoot a cart across the floor, the spring transfers energy to the cart. (This item uses bar graphs to illustrate the amount of elastic energy the spring has and the amount of motion energy the cart has as the cart is rolling across the floor.)


RG124002

A child places a small stone in a slingshot and pulls the elastic band back. When the elastic band is released, the energy of the stone increases, and the energy of the elastic band decreases.


RG196001

Chemical energy is transformed into kinetic energy (motion energy) in a battery operated watch.

