Question

1. A roller coaster car rapidly picks up speed as it rolls down a slope. As it

starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of
the slope, its speed is 22 m/s. What is its average acceleration?
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VR
What is it’s average acceleration ?

Answer 1

The average acceleration, aₐ = 6 m/s²

Step-by-step explanation:

Given that,

The initial speed of the roller coaster car, u = 4 m/s

The final speed of the roller coaster car, v = 22 m/s

The time taken to attain the final speed is, t = 3 s

The average acceleration is defined as the change in the final velocity to initial velocity by time.

aₐ = v - u / t m/s²

Substituting the values in the above equation,

aₐ = 22 m/s - 4 m/s / 3 s

= 6 m/s²

Hence, the average acceleration of the roller coaster is aₐ = 6 m/s²