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Physics chapter 5 quiz
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Gravity
Terms in this set (31)
projectile motion can be described as
the horizontal and vertical components of motion
vector quantity
magnitude and direction
scalar quantity
only magnitude
vector
represents magnitude (length) direction (it points)
examples of vector quantity
acceleration velocity
how can you manipulate scalar quantities
add, subtract, multiply
the resultant of two perpendicular vectors
diagonal
the result of adding two vectors
resultant
for any square the length of the diagonal is
square root of 2 multiplied by either of the sides
what is the relationship of the two perpendicular components of a vector
independent
components of a resultant
two vectors at right angles
resolution
the process determining the components of a vector
what varies horizontal components
air resistance friction
what can the vertical component of a projectile be compared to
the motion of a free falling object
projectile
any object that moves through the air or space acted on only by gravity
what happens when no horizontal force acts on a projectile
the horizontal velocity remains constant
how do projectiles accelerate (no air resistance)
only downward with gravity (10m/s2)
how does the graph of a projectile accelerating only in the vertical direction while moving at a constant velocity look
parabolic (like a parabola)
equation for the distance between no gravity line and curved parabolic line of a projectile
d = 1/2gt2
what does the graph of a projectile look like when the effect of air resistance is significant
path is not a true parable its diminished
(no air resistance) what speed would a projectile hit the ground with if launched at 20m/s
20m/s
if vectors are perpendicular how do you find the resultant
use pythagorean theorem
bonus points on test for using
absolute value and + or - before the constant
can scalar quantities be turned into vector quantities
yes but it has to make logical sense
what is the shape of the path a projectile makes
parabola
what is the path a projectile makes called
trajectory
which direction is a north wind going
to the south
at what angle is the greatest range obtained
45 degrees
ideal path
not considering air resistance or gravity
projectile
anything flying though liquid (air or water)
when doing equations always start with
formula
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