Week 36: Work and Energy

Multiple Select

Which of the following are examples of potential energy?

• A stretched rubber band

• A boulder at the top of a hill

• A moving car

• A rolling ball

Fill in the Blanks

Fill in the blank: At the top of a hill, a boulder has high

energy and zero kinetic energy.

Multiple Choice

Which of the following best describes what happens to a boulder as it rolls down a hill?

• Its potential energy decreases and its kinetic energy increases.

• Its kinetic energy decreases and its potential energy increases.

• Both its kinetic and potential energy increase.

• Both its kinetic and potential energy decrease.

Open Ended

When does a roller coaster have maximum potential energy?

Open Ended

Why does a semi-truck have more kinetic energy than a car moving at the same speed?

Open Ended

If you push against a wall with all your strength and the wall doesn't move, have you done any "work"? Why or why not?

Multiple Choice

According to science, when is work being done on an object?

• When a force is applied and the object moves in the direction of the force

• When a force is applied but the object does not move

• When an object is at rest

• When an object is moving but no force is applied

Open Ended

What is the formula for calculating work in science, and what do each of the variables represent?

Fill in the Blanks

Fill in the blank: The unit of force is

.

Fill in the Blanks

Tommy pulls a wagon 8 meters with a force of 30 newtons. How much work did Tommy do?

Open Ended

Compare the two practice problems involving Tommy and Jenny. What similarities and differences do you notice in how work is calculated in each scenario?

Multiple Choice

Which of the following best describes input energy?

• Energy used to do work

• Energy stored due to position

• Energy of objects in motion

• Energy lost as heat

Fill in the Blanks

Energy can neither be created nor

(law of conservation).

Multiple Choice

What key concept about energy transformation is illustrated by the diagram showing different types of energy?

• Energies transform into each other

• Energy is only stored

• Energy cannot be transferred

• Energy is always lost

Multiple Select

Which of the following are examples of kinetic energy?

• A moving car

• A stretched rubber band

• A ball at the top of a hill

• Wind blowing

Open Ended

Explain the difference between potential energy and kinetic energy using a real-world example.

Open Ended

Based on the images, what type of energy does a jar of cookies on top of a refrigerator have, and why?

Open Ended

What happens to potential energy as a roller coaster descends?

Fill in the Blanks

Fill in the blank: Kinetic energy is the energy of

.

Open Ended

Explain a real-life situation where both potential and kinetic energy are involved. Describe how energy changes from one form to another in your example.

Multiple Choice

What is the main difference between potential energy and kinetic energy?

• Potential energy is stored energy, while kinetic energy is the energy of motion.

• Potential energy is the energy of motion, while kinetic energy is stored energy.

• Potential energy and kinetic energy are the same.

• Potential energy is only found in living things.

Open Ended

What is one thing you learned today about the concept of 'work' in science, and what question do you still have?