Question

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

Answer 1

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 !