ap physics unit 1 part 3 - free fall and projectile motion

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an object is said to be in vertical free fall when the only force acting on it is the _________ _____.

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1

an object is said to be in vertical free fall when the only force acting on it is the _________ _____.

gravitational force

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2

for rising objects, the speed __________ at a rate of _______ m/s²

decreases; 9.8 or 10 m/s²

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3

Vo when the object is first launched

=/= 0

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4

time if the object starts and ends at the same height

tup = tdown = ½ttotal

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5

V at any particular height

Vup = -Vdown

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6

relationship btwn acceleration & gravity at all points along the path (coming up, going down, and at the top)

a = -g

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7

projectile motion occurs when

an object is launched horizontally or at an angle above/below the horizontal

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8

if an object is launched w/ Vo @ angle theta above the horizon, the x component of the V is given by:

knowt flashcard image
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9

if an object is launched w/ Vo @ angle theta above the horizon, the y component of the V is given by:

knowt flashcard image
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10

the acceleration in the x direction is always ___ so the x-velocity ______ _________

0; stays constant

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11

the acceleration in the x direction is always _____ so the y-velocity __________ ___ __ _________ ____

-g; decreases at a constant rate

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12

the only variable common between the x and y motion is:

time (t)

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13

for horizontal motion, only this equation can be used

knowt flashcard image
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14

for vertical motion, only these equations can be used

any of the kinematics equations

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15

in projectile motion w/ no air resistance, the max range occurs when the launch angle is

45°

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16

any 2 angles that add up to ____° will have the same range

90°

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