Which Law of Motion?
A soccer ball keeps rolling across a gym floor until it slowly stops. What force is acting on it, and which law explains this?
Friction or Gravity, Newton's 1st Law
A book is sitting still on a table. What does this tell you about the forces acting on it?
Balanced or Unbalanced?
Balanced
You drop a pencil and it falls to the floor. What force caused it to fall?
Gravity
You bring the north ends of two magnets together. What happens?
they will repel
A ball is held at the top of a slide. What kind of energy does it have?
Potential energy—because of its height.
A skateboarder pushes harder to accelerate faster down the sidewalk. What law does this represent?
Newton's 2nd Law
A car suddenly accelerates at a green light. What kind of force is acting on it?
Balanced or Unbalanced?
Unbalanced
Assuming there are no other forces but gravity, two students drop a tennis ball and a crumpled paper ball at the same time from the same height. Which one hits the ground first?
They hit the ground at the same time?
Where on a bar magnet are the strongest magnetic pulls?
on the ends
The ball rolls down the slide. What energy transformation happens?
Potential energy turns into kinetic energy.
After blowing up a balloon it flies across the room after you let go of it. Which law does this demonstrate?
3rd
A tug-of-war team suddenly gets pulled forward. What does that say about the forces on the rope at that moment?
Unbalanced—the other team applied a greater force.
A roller coaster zooms down a hill and then slows down going up the next one. How are motion and gravity interacting in this moment?
Gravity speeds it up going down and slows it down going up—gravity always pulls downward.
What kind of materials are attracted to magnets?
Iron or Steel
A roller coaster is at its highest point. What does it have more of: potential or kinetic energy?
More potential energy—it’s not moving much but it’s high up.
A heavier shopping cart needs more effort to push than an empty one. Which law is at work?
2nd
A toy car is rolling on a flat surface and eventually comes to a stop. If nothing seems to be touching it, why did it stop? Is that due to balanced or unbalanced forces?
It stopped because of friction—a type of unbalanced force that slows it down.
What is the force of gravity?
____ m/s2
9.8
Why does a compass needle always point north?
Earth has a magnetic field; the needle aligns with Earth’s magnetic north.
Two vehicles are driving the highway at exactly 63.4 mph. One is an semi the other is a car which has more kinetic energy?
semi
A student is sitting in a rolling chair and pushes against the wall, sending themselves backward. What law does this show?
3rd
Bo and Jamys' front door wouldn't open. Bo pushed with a force of 200 N and Jamy pushed with 350 N of force. The door had a force of 500 N.
What happened? Where the forces balanced or unbalanced?
The door opened and unbalanced
An astronaut drops a hammer and a feather on the Moon, and they hit the ground at the same time. Why does this happen there, but not on Earth?
There's no air resistance on the Moon, so gravity pulls both objects equally and nothing slows the feather down.
You wrap wire around a nail and connect it to a battery. It picks up paperclips. What have you created?
Electromagnet
You stretch a rubber band and let it go. Describe the energy before and after release.
Before: potential (elastic energy); after: kinetic energy as it snaps back