3rd Law of Motion
Action & Reaction
Do Now — Review
Describe the motion of these trucks
moving to the right.
Visualizing Newton's 3rd Law
Frank Noschese — John Jay H.S.
Action/Reaction — NASA
(right click, save as)
Which Way Is It Moving?
“Which way is the skater below moving?”
“All the forces in the universe, would be:
a) an even number b) odd c) unknowable”
3rd Law of Motion
“Press on a rock and the rock presses on you
(with an equal, but opposite force)”
— Newton
[ Flash ]
Skateboarder [ HTML5 ]
Skateboarder 2 [ HTML5 ]
Lamp & Table
A lamp applies a force of 10 N to a table.
What force does the table
apply on the lamp?
Which direction is this force applied?
[ Flash ]
Earth & You
Earth pulls down on you.
That's half the story…
Explain this phenomena using one or more
of Newton's Laws of Motion
Magnetically Coupled Pendula 2
School Blocks YouTube?
Use the file below.
Magnetically Coupled Pendula 2.mov
The more active bouncing magnet applies a force on the slower magnet on the opposite side. By applying a force it receives a force and therefore slows down.
3rd Law of Boxing Gloves
Physics of a Boxing Glove Discussion
Paul Hewitt Question
A heavy rock and a light rock in free fall (zero air resistance) have the same acceleration. The reason the heavy rock doesn't have a greater acceleration is that the
A. force due to gravity is the same on each.
B. air resistance is always zero in free fall.
C. inertia of both rocks is the same.
D. ratio of force to mass is the same.
E. None of these.
Isaac Newton
