An apple drops from a branch and falls straight down while Earth pulls on it with 3 N toward the ground. Name the force that pulls the apple down.

A soccer ball sits still on level ground. Earth still pulls down on it with 5 N. Name the force that keeps acting on the ball even though the ball is not moving.

A skydiver falls with Earth pulling down on her with 700 N while the air pushes up on her with 400 N. Name the force that pulls her toward Earth.

The Moon travels around Earth without ever touching it. Name the force that acts across that empty space and keeps the Moon in its orbit.

An astronaut lets go of a hammer on the Moon and the hammer drops to the Moon's dusty surface. Name the force that pulls the hammer down there.

A bag of sand hangs at rest from a spring scale, and the scale shows a 4 N downward pull on the bag. Name the force that produces that downward 4 N pull.

A student slides a cardboard box across a rough floor. As the box slides right, a 15 N force acts to the left along the floor and slows the box. Name that force.

A cyclist squeezes the brakes and the rubber pads press against the spinning metal rim. Name the force between the pads and the rim that slows the wheel down.

A hockey puck glides across smooth ice and slows down very gradually before stopping. Name the force between the puck and the ice that slows it.

A student rubs both palms together quickly and the palms grow warm. Name the force between the palms that resists their sliding and warms them.

A block is pushed forward across sandpaper with a 20 N push, and an 8 N force acts backward along the sandpaper surface. Name the 8 N backward force.

A sled given the same starting push travels 12 m on packed snow but only 3 m on grass. Name the force that is stronger between the runners and the grass.

A bar magnet is held 2 cm above a steel paper clip on a desk. The clip jumps up to the magnet with a 0.5 N pull before the two ever touch. Name that force.

A north pole and a south pole of two bar magnets face each other on a table. They pull toward each other with 1.2 N while a small gap still separates them. Name that force.

A magnet lifts a pile of steel paper clips out of a box but leaves the plastic buttons behind. Name the force that lifts the steel clips.

A magnet is moved from 2 cm to 6 cm from a steel washer, and its pull on the washer drops from 0.6 N to 0.1 N. Name the force that got weaker.

A compass needle swings and points a new direction when a bar magnet is carried past it on the desk, without anything touching the needle. Name the force turning the needle.

A student pushes a shopping cart forward with a steady 25 N push on the handle. Name the force the student's hands exert on the cart.

A player kicks a still soccer ball with a 40 N force and the ball leaves the ground. Name the force the player's foot exerts on the ball.

A dog on a leash pulls forward, and the leash pulls the walker forward with 30 N. Name the force the leash exerts on the walker.

A worker pushes a heavy crate up a loading ramp with a 60 N push along the ramp. Name the force the worker exerts on the crate.

A book is slid across a desk by a hand pushing with 10 N to the right while a 4 N force acts to the left along the desk. Name the force the hand exerts.

A book lies still on a flat table, and the tabletop pushes up on the book with 12 N straight out from the surface. Name the force the table exerts on the book.

A student sits still on a chair, and the seat pushes up on the student with 350 N, straight out from the seat surface. Name the force the seat exerts.

A person stands still on a gym floor and the floor pushes up on the person's shoes, straight out from the floor. What is the name of that upward push?

A box rests on a tilted ramp. The ramp surface pushes on the box with 8 N in a direction straight out from the ramp, not straight up. Name that force.

A tennis ball is set on a car roof and stays there. The roof pushes up on the ball with 2 N, perpendicular to the roof. Name the force the roof exerts.

A bar magnet turns a compass needle across a gap of several centimeters with nothing touching the needle. What kind of force does this show magnetic force to be?

A hand pushes a shopping cart, a table holds a plate up, and a rough gym floor slows a rolling ball. How are the forces acting in these three cases best classified?

A magnet pulls a steel clip from 3 cm away, and Earth pulls a falling ball from far below it. What do the magnetic force and gravity have in common here?

A rope pulls a sled forward with 40 N while the snow rubs against the sled runners with 12 N backward. What kind of force is each of these two forces?

A swimmer pushes water backward with 30 N and the water pushes the swimmer forward with 30 N, forming a Newton's Third Law force pair. Do those two forces act on the same object or on different objects?

A book rests on a table with gravity pulling down on it with 6 N and the table pushing up on it with 6 N. What word describes the forces on the book?

A wagon is pulled forward with a 20 N applied force while friction pushes back with 8 N, giving a net force of 12 N forward. What word describes the forces on the wagon?

The upward push a tabletop exerts on a book resting on it acts perpendicular to the surface of the tabletop.

Gravity stops acting on a ball as soon as the ball comes to rest on the ground.

Friction between a sled's runners and the snow acts in the direction opposite to the sled's motion.

When two bar magnets are brought close together with their north poles facing each other, the magnets pull toward each other.

The 15 N push a student's hand exerts on a classroom door to swing it open is called an applied force.

The normal force on a book resting on a shelf is just another name for the pull of gravity on that book.