Integrated Physics and Chemistry TEKS #4
• 4) Science concepts. The student knows concepts of force and motion
evident in everyday life. The student is expected to:
• (A) calculate speed, momentum, acceleration, work, and power in
systems such as in the human body, moving toys, and machines;
• (B) investigate and describe applications of Newton's laws such as in
vehicle restraints, sports activities, geological processes, and satellite
orbits;
• (C) analyze the effects caused by changing force or distance in simple
machines as demonstrated in household devices, the human body, and
vehicles; and
• (D) investigate and demonstrate mechanical advantage and efficiency
of various machines such as levers, motors, wheels and axles, pulleys,
and ramps
http://www.mste.uiuc.edu/dildine/thesis/sld020.htm
How to Calculate Speed of a
Airplane?
• The airplane above is traveling in a straight line at
a constant speed. Its speed is the distance traveled
divided by the time interval. If we know how far it
is traveling in a given time we can determine its
speed. We can calculate this speed if we have two
images of the plane separated in time.
• Acceleration is the rate of change in velocity of an
object.
• The most common unit of acceleration is m/s/s which
can also be written as m/s2 or ms-2. This means the rate
of change in velocity per second.
• For example if an object increased its velocity by 2
meters every second then its acceleration would be
2m/s/s.
• Accelaration = change in velocity / time taken for
change.
• Therefore if an object travels from stationary to 5 m/s
in 2.5 seconds then its acceleration = 5/2.5 = 2m/s/s.
• Uniform acceleration is just the name given to a
constant acceleration.