7. A roller coaster accelerates from an initial velocity of 6.0 m/s to a final velocity of 70 m/s over 4 seconds. What's the acceleration?
To find the acceleration, we can use the formula:
Acceleration = (final velocity - initial velocity) / time
Acceleration = (70 m/s - 6.0 m/s) / 4 s
Acceleration = 64 m/s / 4 s
Acceleration = 16 m/s^2
Therefore, the acceleration of the roller coaster is 16 m/s^2.