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Physics problems: kinematics

 

Problem 18.

An athlete swims the length of a 50.0-m pool in 20.0s and makes the return trip to the starting position in 22.0s. Determine her average speeds in

(a) the first half of the swim,

(b) the second half of the swim, and

(c) the round trip.

 

Solution:

The average speed is the ratio of the traveled distance and the traveled time.

Then

(a)

 

(b)

 

(c)

 

 

 

 

 

 

 

 

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