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Conceptual Physics - Hewitt - Chapter 5: Projectile Motion
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Gravity
Terms in this set (16)
vector
A _____ quantity includes both magnitude and direction.
scalar
A _____ quantity includes only magnitude.
one times the square root of two
Two perpendicular vectors of magnitude one have a resultant of magnitude _____.
5
Two perpendicular vectors of magnitude 3 and 4 have a resultant of magnitude _____.
2
Two perpendicular vectors of magnitude 1 and the square root of 3 have a magnitude of _____.
components
Two vectors at right angles that add up to a given vector are known as the _____ of the given vector they replace.
resolution.
The process of determining the components of a vector is called _____.
projectile
A _____ is any object that moves through the air or space, acted on only by gravity (and air resistance, if any).
rolling freely
The horizontal component of motion for a projectile is just like the horizontal motion of a ball _____ along a level surface.
freely falling
The vertical component of a projectile's velocity is like the motion for a _____ object.
completely independent
The horizontal component of motion for a projectile is _____ of the vertical component of motion.
the same as that of free fall
The downward motion of a horizontally launched projectile is _____.
d=1/2gt^2
formula to determine the distance an object falls in a certain amount of time
20
How far does a dropped object fall in 2 seconds? (in meters)
45
How far does a dropped object fall in 3 seconds? (in meters)
80
How far does a dropped object fall in 4 seconds? (in meters)
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