The boat, moving away, picks up speed of 43.2 km / h in 2.5 seconds. How fast is the boat moving?

The boat, moving away, picks up speed of 43.2 km / h in 2.5 seconds. How fast is the boat moving? What is his movement during this time?

Let’s designate the initial speed of the boat as 0 km / h.

Find the difference in speed of the boat between the final and initial speed.

43.2 – 0 = 43.2 km / h.

We translate the found speed difference from km / h to m / s.

Since in 1 km – 1000 meters, and in 1 hour – 3600 seconds, we get:

43.2 * 1000/3600 = 12 m / s.

Determine the acceleration of the boat.

To do this, we divide 12 m / s by the specified time interval.

Will be:

12 / 2.5 = 4.8 m / s2

We find the distance that the boat has traveled during this time.

4.8 * 2.52 / 2 = 4.8 * 6.25 / 2 = 15 meters.

Answer:

Acceleration 4.8 m / s2, distance traveled 15 meters.