a roller coaster car rapidly picksup seed as it rolls down a slope. AS it starts down its speed is 4m/s. 3 seconds later its speed is 22 m/s. what is its average acceleration

Question

03-02-2016
Mathematics

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a roller coaster car rapidly picksup seed as it rolls down a slope. AS it starts down its speed is 4m/s. 3 seconds later its speed is 22 m/s. what is its average acceleration

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AL2006 AL2006 · Answer 1 · 2016-02-03T18:29:38+01:00

Change in speed = (end speed) - (start speed)

   =    (22 m/s)    - (4 m/s) = 18 m/s .

Magnitude of average acceleration =

   (change in speed) / (time for the change) .

   =    (18 m/s) / (3 sec) = 6 m/s² .

That's about 0.61 G.
If you weigh 150 pounds, then you would feel as if there's
a force of 92 pounds pushing you back against the seat !