contestada

A roller coaster car begins its roll from the top of the tracks at a speed of2 meters per second. When it reaches the bottom of the 200-meter drop four seconds later, its speed is 22 meters per second. What was the averagespeed of the roller coaster ride in meters per second over the 200-meter drop

Respuesta :

The speed of the car from the top of the track is,

[tex]u=2ms^{-1}[/tex]

The distance traveled by the car is,

[tex]d=200\text{ m}[/tex]

The speed of the car after 4 seconds is,

[tex]v=22ms^{-1}[/tex]

Thus, the average speed of the car is,

[tex]v_{av}=\frac{u+v}{2}[/tex][tex]\begin{gathered} v_{av}=\frac{2+22}{2} \\ v_{av}=12ms^{-1} \end{gathered}[/tex]

Thus, the average speed of the roller coaster car is 12 meter per second.

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