There are three different activities in the Concept Builder. Those three activities are described as follows:

**Activity 1 - Positive, Negative or Zero Work**: Question Groups 1-5. Five Question Groups are presented. Learners must determie whether the situation is describing an example of positive work, negative work, or zero work.**Actvitiy 2 - Gain or Loss**: Question Groups 6-9. Four Question Groups are presented. Learners must identify the force that is doing work and the effect of that force on the total mechanical energy (increase, decrease, or no change) of the object upon which the work is done.**Activity 3: Energy Transformation**: Question Groups 10-14. Five Question Groups are presented. A physical situation involving work is described and learners must determine the energy transformation that is associated with the described instance of work.

The questions from each group are shown below. Teachers are encouraged to view the questions in order to judge which activities are most appropriate for their classes. All activities can be done without any redundancy. At the same time, any of the activities can be done at the exclusion of the others. They are all stand-alone activities.

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Consider this situation:

A car skids to a stop along a level highway.

Is this an example of positive, negative, or zero work being done on the car?

Consider this situation:

A moving book slows to a stop as it slides across the classroom floor.

Is this an example of positive, negative, or zero work being done on the book?

Consider this situation:

A softball player slows to a stop while diving into third base.

Is this an example of positive, negative, or zero work being done on the player?

Consider this situation:

A child slows to a stop while sliding along a lengthy Slip-and-Slide mat.

Is this an example of positive, negative, or zero work being done on the child?

Consider this situation:

A baseball is brought to a stop upon hitting the catcher's mitt.

Is this an example of positive, negative, or zero work being done on the mitt?

Consider this situation:

The downward moving hammer strikes the nail and slows down.

Is this an example of positive, negative, or zero work being done on the hammer?

Consider this situation:

The lineman push on the weighted sled to accelerate it across the football field.

Is this an example of positive, negative, or zero work being done on the sled?

Consider this situation:

Dad gives the child in the swing a forward push in order to set her into motion.

Is this an example of positive, negative, or zero work being done on the child?

Consider this situation:

The horses pull on the carriage in order to get it started in motion.

Is this an example of positive, negative, or zero work being done on the carriage?

Consider this situation:

The weightlifter lifts the barbell above her head.

Is this an example of positive, negative, or zero work being done on the barbell?

Consider this situation:

The student lifts the book from the floor to the top shelf of the locker.

Is this an example of positive, negative, or zero work being done on the book?

Consider this situation:

In the Autos lab, Suzie uses a hydraulic jack to lift a car off the ground.

Is this an example of positive, negative, or zero work being done on the car?

Consider this situation:

Aaron pulls on the handle of the locked classroom door but fails to open it.

Is this an example of positive, negative, or zero work being done on the door?

Consider this situation:

Jonah holds the dog tightly by its leash to prevent it from moving.

Is this an example of positive, negative, or zero work being done on the dog?

Consider this situation:

While doing her stretches, Abigail pushes on a stationary wall.

Is this an example of positive, negative, or zero work being done on the wall?

Consider this situation:

A car with locked wheels skids to a stop while moving along a level highway.

In this situation, work is done on the car by ________.

The car's spinning axles

The friction between tires and road

The road pushing upward on the car

The force of gravity acting upon the car

As the result of this work, the car ________ mechanical energy.

Gains

Loses

Does not change its

Consider this situation:

A moving book slows to a stop as it slides across the classroom floor.

In this situation, work is done on the book by ________.

The floor pushing upward on the book

The friction between the book and floor

The person who originally pushed the book

The force of gravity pulling downward on the book

As the result of this work, the book ________ mechanical energy.

Gains

Loses

Does not change its

Consider this situation:

A softball player slows to a stop while sliding across the infield direct towards third base.

In this situation, work is done on the player by ________.

The infield dirt pushing up on the player

The player's legs while she was running

The earth's gravity pulling down on the player

The friction between the player and the infield dirt

As the result of this work, the player ________ mechanical energy.

Gains

Loses

Does not change its

Consider this situation:

A baseball is brought to a stop upon hitting the catcher's mitt.

In this situation, work is done on the baseball by ________.

The force of gravity on the baseball

The force of the pitcher who threw the baseball

The force of the baseball pushing the mitt forward

The force of the catcher's mitt pusing against the baseball

As the result of this work, the baseball ________ mechanical energy.

Gains

Loses

Does not change its

Consider this situation:

The downward moving hammer strikes the nail and slows down.

In this situation, work is done on the hammer by ________.

The nail pushing upward on the hammer

The hammer pushing downward on the nail

The hand pushing downward on the hammer

The wood board pushing upward on the nail

As the result of this work, the hammer ________ mechanical energy.

Gains

Loses

Does not change its

Consider this situation:

The students push on the stationary box to accelerate it across the gym floor.

In this situation, work is done on the box by ________.

The floor pushing upward on the box

The box pushing backward on the floor

The students applying force to the box

The Earth's gravity pulling downward on the box

As the result of this work, the box ________ mechanical energy.

Gains

Loses

Does not change its

Consider this situation:

Dad gives the child in the swing a forward push in order to set her into motion.

In this situation, work is done on the child by ________.

The force applied by Dad on the child

The seat of the swing holding the child up

The Earth's gravity pulling down on the child

The frame of the swing holding the swing in place

As the result of this work, the child ________ mechanical energy.

Gains

Loses

Does not change its

Consider this situation:

The weightlifter lifts the barbell above her head.

In this situation, work is done on the barbell by ________.

The force of gravity pushing up on the barbell

The force of the floor pushing up on the weightlifter

The force of the barbell pushing down on the weightlifter

The upward force applied by the weightlifter to the barbell

As the result of this work, the barbell ________ mechanical energy.

Gains

Loses

Does not change its

Consider this situation:

The student lifts the book from the floor to the top shelf of the locker.

In this situation, work is done on the book by ________.

The downward force of the book on the student

The upward force of Earth's gravity on the book

The force of the floor pushing up on the student

The upward force applied by the student to the book

As the result of this work, the book ________ mechanical energy.

Gains

Loses

Does not change its

Consider this situation:

A rope is used to pull a bucket of water out of a deep well.

In this situation, work is done on the bucket by ________.

The force of the bucket pulling upward on itself

The force of well pushing upward on the bucket

The force of the rope pulling upward on the bucket

The force of the motor pulling upward on the rope

As the result of this work, the bucket ________ mechanical energy.

Gains

Loses

Does not change its

Work done on an object or system of objects causes a transformation of energy. Consider the following situation:

A car with locked wheels skids to a stop while moving along a level highway.

This situation can best be described as a transformation of ____.

Kinetic energy into Potential Energy

Chemical energy into Kinetic energy

Potential energy into Chemical energy

Kinetic energy into Dissipated energy (e.g., heat and sound)

Chemical energy into Dissipated energy (e.g., heat and sound)

Work done on an object or system of objects causes a transformation of energy. Consider the following situation:

Along the horizontal section at the bottom of a tall slide, a child slows to a stop.

This situation can best be described as a transformation of ____.

Potential energy into Kinetic energy

Potential energy into Chemical energy

Kinetic energy into Chemical energy

Kinetic energy into Dissipated energy (e.g., heat)

Chemical energy into Dissipated energy (e.g., heat)

Work done on an object or system of objects causes a transformation of energy. Consider the following situation:

A softball player slows to a stop while sliding across the infield dirt into third base.

This situation can best be described as a transformation of ____.

Kinetic energy into Chemical Energy

Chemical energy into Kinetic energy

Potential energy into Chemical energy

Kinetic energy into Dissipated energy (e.g., heat and sound)

Chemical energy into Dissipated energy (e.g., heat and sound)

Work done on an object or system of objects causes a transformation of energy. Consider the following situation:

A baseball is brought to a stop upon hitting the catcher's mitt.

This situation can best be described as a transformation of ____.

Kinetic energy into Potential energy

Kinetic energy into Chemical energy

Chemical energy into Kinetic energy

Kinetic energy into Dissipated energy (e.g., heat and sound)

Potential energy into Dissipated energy (e.g., heat and sound)

Work done on an object or system of objects causes a transformation of energy. Consider the following situation:

The lineman push on the weighted sled to accelerate it across the football field.

This situation can best be described as a transformation of ____.

Kinetic energy into Potential energy

Chemical energy into Kinetic energy

Chemical energy into Potential energy

Potential energy into Chemical energy

Potential energy into Dissipated energy (e.g., heat)

Work done on an object or system of objects causes a transformation of energy. Consider the following situation:

Dad gives the child on the sled a long push to set him in motion along the level surface.

This situation can best be described as a transformation of ____.

Potential energy into Kinetic energy

Kinetic energy into Chemical energy

Chemical energy into Kinetic energy

Chemical energy into Potential energy

Dissipated energy (e.g., heat) into Kinetic energy

Work done on an object or system of objects causes a transformation of energy. Consider the following situation:

The light turns green, the driver steps on the gas, and the car accelerates from rest.

This situation can best be described as a transformation of ____.

Chemical energy into Kinetic energy

Kinetic energy into Chemical energy

Potential energy into Kinetic energy

Chemical energy into Dissipated energy (e.g., heat)

Dissipated energy (e.g., heat) into Kinetic energy

Work done on an object or system of objects causes a transformation of energy. Consider the following situation:

The weightlifter lifts the barbell above her head.

This situation can best be described as a transformation of ____.

Potential energy into Kinetic energy

Chemical energy into Potential energy

Kinetic energy into Dissipated energy (e.g. heat)

Dissipated energy (e.g., heat) into Potential energy

Chemical energy into Dissipated energy (e.g. heat)

Work done on an object or system of objects causes a transformation of energy. Consider the following situation:

The student lifts the book from the floor and places it on the top shelf of the locker.

This situation can best be described as a transformation of ____.

Potential energy into Kinetic energy

Kinetic energy into Potential energy

Chemical energy into Kinetic energy

Chemical energy into Potential energy

Chemical energy into Dissipated energy (e.g., heat and sound)

Work done on an object or system of objects causes a transformation of energy. Consider the following situation:

Under the influence of gravity, the ball falls from the second story window to the ground.

This situation can best be described as a transformation of ____.

Options:

Chemical energy into Kinetic energy

Kinetic energy into Chemical energy

Potential energy into Kinetic energy

Potential energy into Chemical energy

Dissipated energy (e.g., heat) into Kinetic energy

Work done on an object or system of objects causes a transformation of energy. Consider the following situation:

Starting from rest at the top of the friction-free slide, the child slides to the bottom.

This situation can best be described as a transformation of ____.

Options:

Kinetic energy into Chemical energy

Chemical energy into Kinetic energy

Potential energy into Kinetic energy

Potential energy into Chemical energy

Dissipated energy (e.g., heat) into Kinetic energy