In a relay race, each contestant runs a distance 24.1m while carrying an egg bal

Question

In a relay race, each contestant runs a distance 24.1m while carrying an egg balanced on a spoon, turns around, and comes back to the starting point. Edith runs the first distance 24.1m in a time t1 = 20.7s . On the return trip she is more confident and takes only time t2 = 15.1s .

What is the magnitude of her average velocity for the first distance 24.1m?

What is the magnitude of her average velocity for the return trip?

What is her average velocity for the entire round trip?

What is her average speed for the round trip?

Explanation / Answer

a) average velocity for the for first displacement

V1 = net displacement /time

V1 = 24.1/20.7 =1.16m/s

b) average velocity of the return trip

V2 = 24.1/15.1 =1.6 m/s

c) average velocity for the whole trip =0

Vtot =0

d) average speed = total distance/time

= 2x24.1/(20.7+15.1) = 48.2/35.8 = 1.35m/s

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