Problem 17P

A finch rides on the back of a Galapagos tortoise, which walks at the stately pace of 0.060 m/s. After 1.2 minutes the finch tires of the tortoise's slow pace, and takes flight in the same direction for another 1.2 minutes at 12 m/s. What was the average speed of the finch for this 2.4-minute interval?

Solution 17P

Step 1 of 2

We need to find the average speed of the finch for the total time interval.

At the beginning, the speed was: .

The time for which it moved at this speed is: .

The distance covered is: .

Then it moved at a speed of .

The time for which it moved at this speed is: .

The distance covered is: