C4 Second Law of Motion

F=ma, and all that follows. Here are demonstrations of the nature of acceleration and examples of forces acting on bodies in motion. This includes demonstrations of terminal velocity.

Articles
Image	Title
	C4-01: AIR TRACK - NEWTON'S SECOND LAW Demonstrate F = ma.
	C4-02 AIR TRACK - A eq F/M Illustrate the experimental basis for Newton's second law of motion
	C4-03: ACCELERATION BY ITERATED BLOWS Illustrate the numerical technique by which a computer carries out integration of the equation a = F/m.
	C4-11: ACCELEROMETER - BALL IN WATER Demonstrate the direction of acceleration for both linear and circular cases.
	C4-12: ACCELEROMETER ON INCLINED PLANE Illustrate the behavior of a liquid accelerometer accelerating down an inclined plane.
	C4-13: ACCELEROMETER ON ROTATOR Show that the surface of a rotating liquid assumes a parabolic shape.
	C4-14: AIR TRACK - ACCELEROMETER Demonstrate the behavior of a liquid accelerometer.
	C4-15: HELIUM BALLOON IN ACCELERATED BOX Illustrate the affect of density on acceleration in a counterintuitive way.
	C4-21 ATWOOD MACHINE Illustrate the second law of motion. Experimentally determine the acceleration due to gravity.
	C4-22: HORIZONTAL ATWOOD MACHINE Demonstrate the Horizontal Atwood Machine quantitatively.
	C4-23: ATWOOD MACHINE WITH HEAVY PULLEY Illustrate the affect of a heavy pulley on the Atwood Machine.
	C4-31: AIR TRACK - THE ACCELERATION OF GRAVITY Experimentally determine the acceleration of gravity.
	C4-32: FREE FALL IN VACUUM - DISK AND FEATHER Demonstrate that bodies of extremely different densities fall with equal acceleration in the absence of air friction.
	C4-34: GALILEO'S EXPERIMENT - MASSES IN FREE FALL Show that the acceleration of bodies in free fall is independent of mass
	C4-41: TERMINAL VELOCITY - BOTTLE IN TUBE An easily observable terminal velocity experiment.
	C4-42: TERMINAL VELOCITY - FEATHER Illustrate terminal velocity.
	C4-43: TERMINAL VELOCITY - STACKED COFFEE FILTERS Illustrate terminal velocity quantitatively.
	C4-51: WEIGHTLESSNESS IN FREE FALL - MASS IN BEAKER Demonstrate weightlessness in free fall.
	C4-52 WEIGHTLESSNESS IN FREE FALL - MASS IN CUP ON POLE Illustrate apparent weightlessness in free fall
	C4-53 WEIGHTLESSNESS IN FREE FALL - MASS ON SPRING Illustrate apparent weightlessness in free fall
	C4-54: WEIGHTLESSNESS IN FREE FALL - MAGNET AND KEEPER Illustrate weightlessness in free fall.
	C4-61: ACCELERATION ON A SCALE Illustrate forces in an accelerating system.
	C4-62 DROPPED SLINKY Illustrate apparent weightlessness in free fall