Magic Can

What type of force and energy is required to make the can move? Pick two.

• Potential Energy
• Kinetic Energy
• Unbalanced force
• balanced force

What force causes the can to stop moving?

When you roll the can along the floor, the rubber band twists. What kind of energy is in the twisted rubber band?

• Potential
• Kinetic

Why does the can stop before it begins to roll back to you?

What do you think happens to the rubber band as the can rolls back to you?

What kind of energy change does the can lose and gain as it rolls back to you?

• kinetic becomes potential
• potential becomes kinetic

What kind of energy are you adding to the can and rubber band when you first push the can? What does the energy that you add become?

• kinetic becomes potential
• potential becomes kinetic

If you were to push (add more force) the can harder, what effect would this have on the energy in the rubber band?

• increase
• decrease
• stay the same

What does the law of conservation of energy state?

Why does the can eventually stop moving? What does the energy become?