6.1 – Investigating Accelerated Motion Using a Trolley or Rider (Leaving Cert Physics): Flashcards
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13 cards from this deck
Two methods for investigating accelerated motion
Two methods for investigating accelerated motion
Trolley with ticker timer & air track with timing gates
Four key motion variables measured
Four key motion variables measured
, (velocities), (acceleration), (time)
Ticker timer frequency
Ticker timer frequency
50 Hz (50 dots per second)
Time interval between ticker timer dots
Time interval between ticker timer dots
rac{1}{50} second
Initial velocity formula (ticker timer)
Initial velocity formula (ticker timer)
u = rac{s_1}{n/50}
Acceleration formula (ticker timer)
Acceleration formula (ticker timer)
a = rac{v-u}{t}
Initial velocity formula (timing gates)
Initial velocity formula (timing gates)
u = rac{l}{t_1} where = card length
Acceleration formula (timing gates)
Acceleration formula (timing gates)
a = rac{v^2 - u^2}{2s}
How to recognize acceleration on ticker tape
How to recognize acceleration on ticker tape
Spaces between dots get progressively larger
Why clean runway & wheels (Method A)
Why clean runway & wheels (Method A)
Remove dirt/grit that causes velocity variations
Key setup step for air track (Method B)
Key setup step for air track (Method B)
Adjust levelling screws until rider moves smoothly
Main error from dirty equipment (Method A)
Main error from dirty equipment (Method A)
Friction causes velocity variations
Card orientation requirement (Method B)
Card orientation requirement (Method B)
Card must be parallel to direction of motion