Science Steve
Science Steve rests a book on his desk. What two forces act on the book?
Normal Force and Gravity
Science Cynthia stands still on the ground. What forces act on her?
Gravity (down) and Normal Force (up)
Physics Phil holds a backpack steady in his hand. What forces act on the backpack?
Force of Gravity (down) and Phil’s upward applied force
Physics Phillis rests her laptop on a table. What forces act on the laptop?
Normal Force (up from table), Force of Gravity (down)
Physics Fido naps in his dog bed on the floor. What forces act on him?
Normal Force (up from bed), Force of Gravity (down)
Steve slides a hockey puck across ice after letting go. What forces act on the puck while it glides? (Ice means happy physics land)
Normal Force and Gravity
Cynthia slides down a smooth slide. What forces act on her?
Gravity, Normal Force, and Friction
Phil lifts a basketball upward at constant speed. What forces act on the basketball?
Force of Gravity (down) and Phil’s upward applied force
Phillis leans against a wall. What forces act on her?
Normal Force from wall, Force of Gravity, Friction
Fido’s owner pulls him in a wagon at constant speed. What forces act on the wagon?
Tension, Friction, Normal Force, Force of Gravity
Steve pushes a wall as hard as he can, but it doesn’t move. What forces act on the wall?
Normal Force, Force of Gravity, and Steve’s Push (Applied Force)
Cynthia slides down a rough slide on the playground. What forces act on her?
Normal Force, Gravity, Friction
Phil drops a ball from rest. What forces act on it as it falls? (not in happy physics land)
Force of Gravity (down) and Air Resistance (up)
Phillis pushes a box across the floor and it speeds up. What forces act on the box?
Applied Force, Friction, Normal Force (up from floor), Force of Gravity
Fido slides across the kitchen floor after jumping off the couch. What forces act on him?
Friction (backward), Normal Force (up), Force of Gravity (down)
Steve pushes a book across a desk at constant speed. What forces act on the book?
Applied Force (Steve's push), Friction, Normal Force, and Gravity
Cynthia swings forward on a swing and passes through the lowest point. What forces act on her?
Tension in the ropes, Force of Gravity
Phil throws a ball upward. What forces act on it while it moves upward through the air? (Happy Physics Land)
Force of Gravity (down)
Phillis pulls a backpack upward with a rope. What forces act on the backpack?
Tension (upward), Force of Gravity (downward)
Fido’s leash is tied to a post. He pulls forward, but the leash keeps him from moving. What forces act on Fido?
Tension (backward from leash), Force of Gravity, Normal Force, Friction
Steve stands on a scale in an elevator that is not moving. Draw and label a free-body diagram showing all forces acting on him.
Force of Gravity (down) and Normal Force (up) — equal in magnitude
Science Cynthia leans against a brick wall while standing still on the ground. Draw and label a free-body diagram showing all forces acting on Cynthia.
Force of Gravity, Normal Force from the Ground, Normal Force from the Wall, Friction between her feet and the ground (or her feet would slide out from under her and she'd fall!)
Phil holds a box against a wall, pressing it so it doesn’t fall. Draw a free-body diagram showing all forces on the box.
Gravity (down), Normal Force from wall (outward), Phil pushing it into the wall (inward) and Friction (upward)
Phillis pushes a cart up a smooth ramp. Draw a free-body diagram showing all forces acting on the cart.
Applied Force (Phillis push), Normal Force (perpendicular to ramp), Force of Gravity (straight down).
Physics Fido pulls a wagon (using a rope) up a hill that has a rough surface.
Draw and label a free-body diagram showing all forces acting on the wagon.
Tension (from the rope pulling the wagon), Friction (down the hill, opposing motion), Normal Force (perpendicular to the hill’s surface), Force of Gravity (straight down toward Earth)