Misconception EGM011:

The motion energy of an object does not depend on the mass of the object (Herrmann-Abell & DeBoer, 2009, 2010).

Items that test for misconception EGM011 in this key idea (Motion energy (kinetic energy) is a…)
Item ID
Number

Item Description

How Often the Misconception was Chosen

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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.

48%

EG007002

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

26%

EG002002

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

20%

Items that test for misconception EGM011 in other key ideas

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.

57%

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.

52%

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.

47%

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.)

44%

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.

38%

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.

30%

EG002003

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

30%

EG007003

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

27%

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.

26%

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

18%

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.

18%

EG009004

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

16%

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.

14%

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.

13%

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.

10%