Transcript racing - MathinScience.info

Kimberly Holloway
Pocahontas Middle School
Powhatan, Virginia
A frame of reference is the standard used
for judging or deciding if motion has
occurred in a situation. Motion can be
determined by using the frame of
reference to measure from point A to
point B.
The most common frame of reference is
the horizon.
Law 1 : An object at rest
tends to stay at rest and
an object in motion tends
to stay in motion with
the same speed and in
the same direction unless
acted upon by an
unbalanced force.

Law 2: The second law
states that the
acceleration of an object
is dependent upon two
variables - the net force
acting upon the object
and the mass of the
object.

Law 3: "For every
action, there is an equal
and opposite reaction."

Speed
Acceleration
=
Distance / Time
=
Force / Mass
Velocity = Change in Acceleration / time
Speed = Distance / Time
S = 26 acres / 4 hours
A tractor on the farm
can cover 26
acres of field in 4
hours. What is the
tractor’s speed?
S = 6.5 acres/hour
If a vehicle with a
mass of 1.6 kg is
rolling with a force
of 50 N, calculate
the car’s rate of
acceleration.
A = F / M
A = 50 N / 1.6 kg
A = 31.25 N / kg
Karl was driving to work at a rate of 60 mph. He
had to pull over to the side of the road when he
discovered he had a flat tire. He did this quickly,
in 10 seconds, for the traffic was terrible! What
was the rate of Karl’s velocity?
V = (end – start) / time
V = (0 mph – 60 mph) / 10 sec
V = - 60 mph / 10 sec
V = - 6 mph / sec