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,The vertical position of any object at any moment is given Y
by it's what coordinate?
What is displacement? change in positon
Does displacement equal distance? NO
What are vectors? quantities that have both magnitude and direction
How are vectors represented in vectors? By arrows
What is average velocity? Displacement/time elapsed
What is the unit for average velocity? m/s
Does speed have direction? NO
Is speed or velocity: a positive number with units and Speed
without direction?
Is speed or velocity: having magnitude and direction? velocity
What is equal to the absolute magnitude of velocity? speed
Does average velocity = average speed? NO
What is average acceleration? Change of velocity/time elapsed
What's a freely falling object? -near earth's surface
-ignore air resistance
What did Galileo postulate? in the absence of air- all objects (light or heavy) would fall with the SCA
, What did Galileo claim about the speed of falling speed will increase as they fall.
objects?
Can air resistance be neglected in many ordinary yes
circumstances?
What does air act as a resistance to? -very light objects
-large surface areas
In a vacuum, t1= t2
At a given location on earth, in the absence of air fall with the same constant acceleration
resistance all objects:
What is acceleration due to? gravity
How would you solve a problem for freely falling Use kinematic Equations for Constant Acceleration;
objects? -Use the value of 'g' instead of 'a';
- Substitute 'y' in place of 'x' (Vertical Motion)
What are vector quantities? Displacement, velocity, acceleration, force
What are scalar quantities? distance, speed, time, mass
What is displacement, velocity, acceleration, and force an vector
example of?
What is distance, speed, time, and mass an example of? scalar
List the tail to tip graphical method Draw one of the vectors on a diagram;
2. Place the second vector's tail at the tip of the first vector with
correct direction;
3. Place the third vector's tail at the tip of the second vector with correct direction;
4. Draw the Resultant Vector (from the TAIL of the first vector to the TIP of the final
vector).
The magnitude of a vector is always positive
the sign of the vector presents its direction
How do you subtract vectors? sum of the first and negative of the second