40 terms

Projectile Motion Ch. 3

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Vector Quantity
A quantity in physics, such as force, that has both magnitude and direction.
Scalar Quantity
A quantity in physics, such as mass, volume, and time, that can be completely specified by its magnitude, and has no direction.
Vector
An arrow whose length represents the magnitude of a quantity and whose direction represents the direction of the quantity.
Resultant
The vector sum of two or more component vectors.
Component
One of the vectors, often mutually perpendicular, whose sum is resultant vector. Any resulant vector may be regarded as the combination of wo or more components.
Resolution
The process of resolving a vector into components. In optics, a measure of how well closely adjacent optical images are disinguished.
Projectiles
Any object that moves through the air or through space, acted on only by gravity (and air gravity resistance, if any).
Satellite
An object that falls around earth or some other body rather than falling into it.
free fall
when the only force acting on an object is gravity
projectile
an object in free fall is know as a
same rate
neglecting air resistance all objects fall at the _________ _______
9.8 m/s2
acceleration due to gravity (g)
zero initial velocity
drop
9.8 m/s
if you drop an object, its speed will increase ______ every second
initial velocity
throwing an object downward is just like dropping an object, only with _____ _________
upward, downward
when you throw an object up, it has _______ initial velocity and ______ acceleration
9.8 m/s
you throw a ball straight up as it rises the ball slows down by _______ each second
zero
you throw a ball straight up when it reaches the top of its path the ball's speed is...
9.8 m/s
you throw a ball straight up as it falls, the ball's speed increases by _________ each second.
9.8 m/s2 downward
you throw a ball straight up the entire time the ball's acceleration is...
same
you throw a ball straight up it takes the ball the _______ amount of time to rise as to fall
speed
you throw a ball straight up the ball returns to you hand with the same _____ it left with
down, vertical
because gravity pulls straight ______ it only affects the ____________ motion of a projectile.
stays constant
the horizontal velocity of a projectile always...
free fall
the vertical velocity of a projectile acts like an object in...
parabola
the curved path followed by a projectile under the influence of constant gravity only
time
the only thing that can cross the line of the columns of horizontal and vertical is....
zero
horizontal acceleration always because the ball is in free fall
90 degrees
to give a projectile max height launch it at an angle of...
45 degrees
when launching a projectile from level ground the angle that will result in max range is...
range
horizontal displacement
complementary angles
_____________ ________ will result in the same range
air resistance
frictional force air exerts on a moving object; acts opposite in direction to the object's motion
hang time
the total time the object is in the air
velocity
speed in a given direction
acceleration
change in velocity
displacement
distance and direction of an object's change in position from the starting point
vector
a quantity that has magnitude and direction`
scalar
magnitude only
resultant
a vector that is the sum of two or more other vectors