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RECOGNIZING MOTION Motion is when its distance from another
stationary object is changing
Using a reference point
Describing distance Measurement are in ____________________.
CALCULATING SPEED Formula is ______________________
Constant speed: same speed
Average speed: changing speeds total distance / total time
GRAPHING MOTION Graphs (x,y)
Slope: y₂ - y₁/ x₂ - x₁
Slope intercept form: y = mx + b m= slope b = y intercept
x = linear line x ² = U shaped curved line (parabola)
SECTION 1 REVIEW Why do you need a reference point to
know if an object is moving? What is the difference between an
object’s speed and an object’s velocity? The bamboo plant grows 15 cm in 4
hours. At what average speed does the plant grow
GRAPH Times (s) Baby Sarah
distance (m) Baby Scott distance (m)
0 0 0
1 0.5 0.4
2 1 0.8
3 1.5 1.2
4 2 1.6
What is each baby’s speed?
ACCELERATION Acceleration: increasing speed,
decreasing speed, or changing direction
Calculating acceleration: Acceleration= final velocity – initial velocity/
timeTime is squared m/s² An eagle accelerated from 15m/s to 22m/s in 4 seconds.
What is the eagles average acceleration?
WHAT IS FORCE? Unbalanced force:
acting forces are unequal and will cause the object to move.
Balanced forces: All forces are equal and the object will not
change its motion or nonmotion
NEWTON’S FIRST LAW OF MOTION That an object at rest will remain at rest
and an object that is moving at a constant velocity will continue moving unless acted upon by an unbalanced force.
Inertia: is the tendency of an object to resist change in motion.
Mass: is the amount of matter in an object.
NEWTON’S SECOND LAW OF MOTION The net force on an object is equal to
the product of its acceleration and its mass
Force( newtons) = mass x acceleration
Acceleration = force / mass
NEWTON’S THIRD LAW OF MOTION States that if one object exerts a force
on another object, then the second object exerts a force of equal magnitude in the opposite direction on the first object
FRICTION Friction acts in the opposite direction of
motion Two factors:
Type of surface How hard the surfaces are push together
(weight)