PHYSICS 211 LAB
MARCH 2, 2009
SECTION 001 (MON. @ 12:202:20)
NEWTONS
SECOND LAW
Abstract
The objective if this lab was to investigate the relationship between the
acceleration of objects of different mass due to gravity. We did this by letting varying
weights pull on a cart, and measure the time it took this cart to move approximately 50
centimeters. We determined that the slope of the line that represented our data was equal,
or closely equal, to the mass of the cart which is 491.4g. We manipulated the basic
equation [d= (1/2)*a*t^2 to calculate a, which is acceleration. A=2*(d/t^2), and it is
measured in m/s^2.
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View Full DocumentINTRODUCTION
Newton’s second law of motion explains how the velocity of an object changes
when it is subjected to an external force. The law defines a force to be equal to change in
momentum per change in time. For an object with a constant mass, the second law states
that the force is the product of an object's mass and its acceleration:
F = m * a
For an external applied force, the change in velocity depends on the mass of the object. A
force will cause a change in velocity and a change in velocity will generate a force. This
is important today because the motion of an aircraft resulting from aerodynamic forces
and the aircraft weight can be computed by using the second law of motion. We were
first introduced to this concept in class when Dr. Tedeschi showed us that infamous video
clip of a hammer and a feather. The equipment we used were all standard devices:
Balance, Pasco cart and track, bubble level, 1.1meters of string w/ paperclip, timer w/ 2
photogates, 410g and 15g masses, pulley, and a small plastic fence.
Procedure:
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 Spring '11
 Black
 Acceleration, Force, Gravity, Mass

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