Newton's Third Law - AP Physics C Mechanics
- Identify the reaction force when a person punches a punching bag.
- Bag exerts force on hand. The bag pushes back with equal force.
- Which force pair demonstrates Newton's Third Law in a car collision?
- Car on wall, wall on car. The collision creates equal and opposite forces between objects.
- What happens when two ice skaters push off each other?
- Each skater moves in opposite directions. Equal and opposite forces cause mutual acceleration.
- What happens when a car tire pushes back on the road?
- Road pushes tire forward. Friction from the road propels the car forward.
- Describe the forces when a person uses a rowing machine.
- Machine pulls person backward. The rowing motion creates equal and opposite forces.
- What happens when two billiard balls collide?
- Each exerts equal force on the other. Newton's Third Law governs all collision forces.
- What is the reaction force when a rocket expels gas downwards?
- Gas pushes rocket upward. Conservation of momentum propels the rocket upward.
- What is the reaction force when a person sits on a chair?
- Chair pushes person upward. The normal force balances the person's weight.
- What is the reaction force when a person slaps water?
- Water pushes back on hand. Water exerts equal force in the opposite direction.
- In terms of forces, what occurs when a swimmer pushes water backwards?
- Water pushes swimmer forward. Water's reaction force creates forward propulsion.
- What is the reaction when a magnet pulls a piece of iron?
- Iron pulls magnet. Magnetic forces are mutual and equal in magnitude.
- What is the action-reaction pair when a cyclist pedals a bike?
- Pedals on feet, feet on pedals. Pedal forces create equal reactions for propulsion.
- State the action-reaction pair when a bird flies by flapping wings.
- Wings on air, air on wings. Air pushes wings upward as wings push air downward.
- Identify the action-reaction pair in a tug-of-war game.
- Team on rope, rope on team. Each team experiences equal tension forces.
- What is the reaction force when a horse pulls a cart?
- Cart pulls back on horse. Tension forces act equally on horse and cart.
- Identify the reaction force when a hammer strikes a nail.
- Nail exerts force on hammer. The nail pushes back with equal force on impact.
- Describe the forces when a person kicks a soccer ball.
- Ball exerts force on foot. Both objects experience equal magnitude forces.
- What is the reaction force when a dancer pushes off the floor?
- Floor pushes dancer upward. The floor provides reaction force for upward motion.
- What happens according to Newton's Third Law when a door is pushed open?
- Door pushes back with equal force. All applied forces have equal and opposite reactions.
- Identify the reaction force when a bullet is fired from a gun.
- Gun recoils backward. Conservation of momentum causes the gun to move backward.
- What is the action-reaction pair when a baseball is caught by a glove?
- Ball on glove, glove on ball. Contact forces between objects are always paired.
- Identify the reaction force when a bird perches on a branch.
- Branch exerts force on bird. The branch supports the bird with upward force.
- Identify the action-reaction pair when a book rests on a table.
- Book on table, table on book. Both forces are equal in magnitude and opposite in direction.
- What is the action-reaction pair when a person walks?
- Foot on ground, ground on foot. Friction enables forward motion through equal opposite forces.
- State the action-reaction pair when a fish swims by pushing water.
- Fish on water, water on fish. Newton's Third Law applies to all contact forces.
- Describe the forces when a person claps their hands together.
- Each hand pushes against the other. Both hands experience equal impact forces.
- State Newton's Third Law.
- For every action, there is an equal and opposite reaction. The fundamental principle that forces always occur in pairs.
- What happens when a diver pushes off a diving board?
- Board pushes diver upward. The diving board's reaction creates upward thrust.
- What is the reaction force when a bat hits a baseball?
- Baseball exerts force on bat. Contact forces are always equal and opposite.
- Describe the forces when you squeeze a spring.
- Spring pushes back with equal force. The spring's restoring force follows Newton's Third Law.
- Describe the forces when a child jumps on a trampoline.
- Trampoline pushes child upward. The trampoline's elastic force creates upward motion.
- Identify the action-reaction pair when a skier pushes against the snow.
- Skier on snow, snow on skier. Friction forces enable skiing through Newton's Third Law.
- Identify the forces when a person leans against a wall.
- Wall exerts equal force back. The wall provides equal support force.
- What is the reaction force when a person spins a wheel?
- Wheel exerts torque back on hand. Rotational forces also follow Newton's Third Law.
- What is the action-reaction pair when you jump off a boat?
- Feet on boat, boat on feet. Both forces are equal, causing opposite motion directions.
- Explain the forces involved when a jet engine expels exhaust gases.
- Gases push engine forward. Expelled gases create equal and opposite thrust.
- Identify the reaction force when a ball hits the ground.
- Ground pushes ball upward. The ground exerts an equal and opposite force.
- Describe what happens when you push against a wall.
- Wall pushes back with equal force. Newton's Third Law ensures forces are equal and opposite.
- Identify the reaction force when you blow up a balloon and release it.
- Air exits balloon, balloon moves opposite. Air escapes one way, balloon accelerates the other way.
- What is the action-reaction pair when a person rows a boat?
- Oar on water, water on oar. Water resistance propels the boat forward.