motion speed, velocity, and acceleration frames of reference w the object or point from which...
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Motion
Speed, Velocity, and Acceleration
Frames of Reference The object or point from which
movement is determined Movement is relative to an object
that appears stationary Earth is the most common frame
of reference
Questions
What is the frame of reference for the sunset?
What is a frame of reference?
What is the most common frame of reference?
Question
When can you determine how fast you are going in a jet plane?
Motion Motion is a change in position
relative to a frame of reference Speed is the distance traveled
in a given amount of time Speed=distance time
Speed
The units for speed: meters/second (m/sec) kilometers/hour (km/hr) Speed that does not change
is constant speed
Average speed
Total distance divided by the total time
Formula: Total distance total time
Velocity Speed in a given direction Velocities in the same direction
combine by adding Velocities in different
directions combine by subtracting
Interesting fact
Rockets are launched in the same direction of the earth’s rotation to get an extra boost of 1800 km/hr to its speed
Questions What is motion? What is speed? How is it calculated?
What is average speed?
Questions
How is velocity different from speed?
Which two factors determine an object’s velocity?
Acceleration The change in velocity Acceleration is measured in
m/sec/sec or m/sec2
Formula is: (final velocity - original
velocity)/time
Deceleration vs. Acceleration A decrease in velocity is
deceleration or negative acceleration
A distance-time graph for acceleration is always a curve
Centripetal Acceleration
Acceleration directed toward the center of circular path
Questions What is acceleration? What is the shape of a
distance-time graph for acceleration?
What is centripetal acceleration?
Momentum Momentum is equal to the mass of an object times its velocity
momentum= mass x velocity
Conserving Momentum The law of conservation of momentum states that the total momentum is NOT lost, only transferred
Questions What is momentum? What happens to momentum
as the mass of a moving object increases?
What is the formula for momentum?
What is the law of conservation of momentum?