Starting from rest, a speedboat reaches a speed of 5.9 ms in 3.3 seconds. What is the boat's speed after an additional 2.8 seconds has elapsed, assuming the boat's acceleration remains the same

The speed is _?

  10.9 m/s

Explanation:

If the boat starts from rest with constant acceleration, the speed is proportional to the time. The speed (s) of interest is the solution to the proportion ...

  s/5.9 = (3.3+2.8)/3.3

  s = 5.9(6.1)/3.3 ≈ 10.9 . . . . m/s

The speed is 10.9 meters per second.

amplitude

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