Third principle of dinamyc “ For every action there ’ s a reaction equal and opposed ”

Third principle of Third principle of dinamycdinamyc

““For every action For every action therethere’’s a reaction s a reaction equal and opposedequal and opposed””

The third law states that all forces exist in pairs: if one The third law states that all forces exist in pairs: if one object object AA exerts a force F exerts a force FAA on a second object on a second object BB, then , then BB simultaneously exerts a force Fsimultaneously exerts a force FBB on on AA, and the two , and the two forces are equal and opposite: Fforces are equal and opposite: FAA = −F = −FB. B. The third law The third law means that all forces are means that all forces are interactionsinteractions between different between different bodiesand thus that there is no such thing as a bodiesand thus that there is no such thing as a unidirectional force or a force that acts on only one body. unidirectional force or a force that acts on only one body. This law is sometimes referred to as the This law is sometimes referred to as the action-reaction law, with F, with FAA called the "action" and F called the "action" and FBB the "reaction". The action and the reaction are the "reaction". The action and the reaction are simultaneous, and it does not matter which is called the simultaneous, and it does not matter which is called the actionaction and which is called and which is called reactionreaction; both forces are part ; both forces are part of a single interaction, and neither force exists without of a single interaction, and neither force exists without the other.The two forces in Newton's third law are of the the other.The two forces in Newton's third law are of the same type (e.g., if the road exerts a forward frictional same type (e.g., if the road exerts a forward frictional force on an accelerating car's tires, then it is also a force on an accelerating car's tires, then it is also a frictional force that Newton's third law predicts for the frictional force that Newton's third law predicts for the tires pushing backward on the road).tires pushing backward on the road).

From a conceptual standpoint, Newton's third From a conceptual standpoint, Newton's third law is seen when a person walks: they push law is seen when a person walks: they push against the floor, and the floor pushes against against the floor, and the floor pushes against the person. Similarly, the tires of a car push the person. Similarly, the tires of a car push against the road while the road pushes back on against the road while the road pushes back on the tires—the tires and road simultaneously the tires—the tires and road simultaneously push against each other. In swimming, a person push against each other. In swimming, a person interacts with the water, pushing the water interacts with the water, pushing the water backward, while the water simultaneously backward, while the water simultaneously pushes the person forward—both the person pushes the person forward—both the person and the water push against each other. The and the water push against each other. The reaction forces account for the motion in these reaction forces account for the motion in these examples. These forces depend on friction; a examples. These forces depend on friction; a person or car on ice, for example, may be person or car on ice, for example, may be unable to exert the action force to produce the unable to exert the action force to produce the needed reaction forceneeded reaction force

Also physics is funny!Also physics is funny!Enjoy :3Enjoy :3

And now some And now some exercises!exercises!

What is Newton's Third Law about?What is Newton's Third Law about?A. F=MA. F=MAB. What ever is in motion stays in motion. What ever is in motion stays in motionC. Action-Reaction Forces. Action-Reaction Forces

What happens to the wheels of a car on an icy road?What happens to the wheels of a car on an icy road?A. The wheels on the car can't grip the road. The wheels on the car can't grip the roadB. The wheels don't move. The wheels don't moveC. The wheels fall off. The wheels fall off

Which of the following pairs are action-reaction Which of the following pairs are action-reaction pairs?pairs?A. The sun shines and the snow melts. The sun shines and the snow meltsB. The ball hits the window and the window breaks. The ball hits the window and the window breaksC. Jenna pushes on the table and the table pushes . Jenna pushes on the table and the table pushes on Jennaon Jenna

What do we call the forces that constitute an What do we call the forces that constitute an interaction in Newton's 3rd law?interaction in Newton's 3rd law?A. Action-Reaction forces. Action-Reaction forcesB. Force-Interaction forces. Force-Interaction forcesC. Horse-Cart forces. Horse-Cart forcesD. Jenna-Joya Forces. Jenna-Joya Forces

Inanimate objects can exert forces.Inanimate objects can exert forces.A. True. TrueB. False. False

What happens when 2 cars with different masses What happens when 2 cars with different masses have a head-to-head collision?have a head-to-head collision?A. The car with less mass has a greater time of . The car with less mass has a greater time of impact.impact.B. They experience the same force of impact.. They experience the same force of impact.C. The cars just bounce off each other.. The cars just bounce off each other.

If two cars with different masses experience the same If two cars with different masses experience the same Force of Impact and the same impulse then what would Force of Impact and the same impulse then what would be different?be different?A. Change of momentum. Change of momentumB. Time of impact. Time of impactC. Momentum. MomentumD. Acceleration. Acceleration

If you push on something, it....?If you push on something, it....?A. pushes back on you.. pushes back on you.B. doesn't moves.. doesn't moves.C. falls.. falls.D. swings.. swings.

If you have on rollerskates and you push on a wall, what If you have on rollerskates and you push on a wall, what will probably happen?will probably happen?A. You fall.. You fall.B. You roll back.. You roll back.C. You crash into the wall.. You crash into the wall.D. You slip and DIE.. You slip and DIE.

A person touches his/her A person touches his/her nose and his/her nose nose and his/her nose touches back.touches back.A. TrueA. TrueB. False B. False