
Understanding Newton's Third Law of Motion
Explore the principles of Newton's Third Law of Motion which states that for every action, there is an equal and opposite reaction. Discover examples illustrating this law and learn how forces influence the motion of objects.
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Presentation Transcript
Newtons Third Law of Motion Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first. To every action there is an equal and opposite reaction F(AB) = - F(BA) Forces come in pairs. In nature there is no single force (all by itself).
Examples I exert a force on a desk with my foot and the desk exerts a force back on my foot. ( I kick a desk and the desk kicks me back. ) A hammer exerts a force on a nail and the nail exerts a force back on the hammer.
Force on and by A force influences the motion of an object only when it is applied on that object. A force exerted by a body does not influence that body (itself); it only influences the OTHER body on which it is exerted. F(AB) = - F(BA)
Group Activity 1. Explain walking forward on East Bottom. 2. Explain birds flying south. 3. Explain a rocket lifting off Cape Canaveral. 4. A person throws a package out of a boat (initially at rest). 5. A bat exerts a 50 N force on a baseball. 6. An inflated, but untied, balloon flies off. 7. Earth exerts gravitation on the moon.