Acceleration

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Last updated 7:44 AM on 9/4/26
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25 Terms

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Acceleration

Rate of change in velocity (speed or direction).

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Acceleration formula (base)
a = (v - v0) / t
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Acceleration units
m/s² or ft/s²
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Positive acceleration
Speeding up in a straight line.
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Negative acceleration
Slowing down (deceleration).
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Centripetal acceleration formula
a = v² / R
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Centripetal acceleration direction
Inward, toward the center of the turn.
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Gravity acceleration (Metric)
9.8 m/s² (or 980 cm/s²) down
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Gravity acceleration (Imperial)
32 ft/s² down
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Code for v0 = 0
"Dropped" or "Starts from rest"
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Code for d0 = 0
"Starts at the origin" or "starts at zero distance"
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No final speed (v)

d = d0 + v0t + 1/2at²

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No acceleration (a)

d = d0 + 1/2(v0 + v)t

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No distance (d)

v = v0 + at

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No time (t)

v² = v0² + 2a*(d - d0)

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Dropped shortcut: distance with time

d = 1/2at²

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Dropped shortcut: distance with velocity

d = 1/2vt

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Dropped shortcut: velocity with time
v = at
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Dropped shortcut: velocity with distance
v² = 2ad
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Missing TIME (t)
Use v² = v0² + 2ad
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Missing DISTANCE (d)
Use v = v0 + at
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Missing ACCELERATION (a)

Use d = 1/2(v0 + v)t

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Missing FINAL SPEED (v)

Use d = v0t + 1/2at²

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Minutes to hours conversion
Divide by 60
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Seconds to hours conversion
Divide by 3600