Matt set a record for the men's 100 m freestyle even in swimming. It took him 49.17 s to swim the 50.0 m length of the pool and swim back. Assume that half of Matt's record time was spent traveling the length of the pool. What was his speed?

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Answer 1 · 2018-06-28T21:02:39

$2.03$ $2.03$ $m / s$ $m//s$

$49.17 s$ $49.17s$ was half of the record time.

the full record time would therefore be $49.17 s \cdot 2$ $49.17s * 2$ , which is $98.34 s$ $98.34s$ .

the full length of the race in the full record time is $100 m$ $100m$ in $49.17 s$ $49.17s$ .

average speed = total distance / total time

total distance / total time $= \frac{100 m}{49.17 s}$ $= (100m)/(49.17s)$

$\frac{100}{49.17} = 2.03 (3 s . f .)$ $100/49.17 = 2.03 (3s.f.)$

average speed $= 2.03$ $= 2.03$ $m / s$ $m//s$ $(3 s . f .)$ $(3s.f.)$