Constant Acceleration - 1D (Edexcel A-Level Mathematics): Flashcards

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Acceleration due to Gravity
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Acceleration due to gravity definition

Acceleration experienced by an object in free fall under gravity only

Standard value of gg on Earth (m/s²)

Approximately 9.819.81 m/s²

Do all objects fall at same rate in vacuum?

Yes, regardless of mass

Direction of acceleration due to gravity

Always downward, towards Earth's centre

Sign of aa if upward is positive direction

a=9.8a = -9.8 m/s²

Initial velocity uu when dropped from rest

u=0u = 0

Velocity vv at maximum height of upward throw

v=0v = 0

Acceleration at maximum height of trajectory

Still 9.8-9.8 m/s² (gravity continues acting)

Time of flight vs time to max height relationship

Time of flight = 2×2 \times time to max height

Air resistance assumption in problems

Ignored unless specifically mentioned

SUVAT equation linking vv, uu, aa, tt

v=u+atv = u + at

SUVAT equation without time tt

v2=u2+2asv^2 = u^2 + 2as

SUVAT equation for ss using uu, tt, aa

s=ut+12at2s = ut + \frac{1}{2}at^2

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