A dolphin maintains a constant speed of 2.0 m/s for 24 s while swimming in a straight line. It then reverses direction and returns to its st

Question

A dolphin maintains a constant speed of 2.0 m/s for 24 s while swimming in a straight line. It then reverses direction and returns to its starting point in 8 s. Its average speed and average velocity for the entire trip are

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Maris 2 months 2021-07-28T08:52:29+00:00 1 Answers 3 views 0

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    2021-07-28T08:53:31+00:00

    Answer:

    Average speed 3m/s

    Average velocity is 4m/s

    Explanation:

    In this problem, we are going to solve for the average speed and average velocity for the entrire trip made by the dolphin.

    Given data

    speed v= 2 m/s

    time t= 24s

    the distance travelled by the dolphin is

    speed= distance/time

    distance= speed*time

    distance= 2*24

    distance= 48m

    now the dolpine made a reverse and covered this 48m in 8s to return to it initial position

    the speed it took is

    speed= distance/time

    speed= 48/8

    speed= 6m/s

    It average speed is the total distance divided by the total time taken

    average speed= (48+48)/(24+8)= 96/32= 3m/s

    average speed= 3 m/s

    it average velocity is the sum of the initial and final velocity is divided by 2 to find the average

    (2+6)/2= 8/2= 4m/s

    average velocity is 4m/s

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