You are infected by the streptococcus <em>bacterium</em>. You will suffer from a sore throat, as well as occasional rubus of the gastric musosa, unrtil you shake that thing. Shake it now, baby !

7 0

3 years ago

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Every year, new records in track and field events are recorded. Let's take an historic look back at some exciting races.

Gala2k [10]

100 meters in 9.92 seconds,
=distance/time
=100m/9.92s
=10.0806 m/s

4 0

2 years ago

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One speed skater starts across a frozen lake at an average speed of 8 m/s. Ten seconds later, a second speed skater starts from

Luba_88 [7]

Answer:

40 s

Explanation:

After 10 seconds, the first skater would have a 8m/s * 10s = 80 m head start

Let t be the number of seconds after the second skater starts will the second skater overtake the first skater

The distance traveled by the first skater after t seconds is

$s_1 = v_1t = 8t$

Similarly the distance traveled by the 2nd skater after t seconds is

$s_2 = v_2t = 10t$

Since the 2nd skater catches up to the 1st one after 80 m behind, the distance traveled by the 2nd one must be 80m greater than the distance of the 1st skater

$s_2 = s_1 + 80$