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aalyn [17]
3 years ago
12

Some physics kids were testing some changes they made to make their bikes go faster. Theyposted the following speeds on the clas

s whiteboard. Who went the fastest? Scot went 15,000 m/hr George went 15 km/hr Fred went 4.3 m/s May went 13 km/hr
Physics
1 answer:
Elena L [17]3 years ago
8 0
To do this, you need to make sure that all speeds are the same unit. Since there are three 2 speeds already in km/hr, it would be best that you match the other 2 speeds into that unit as well. 

Conversion of 15,000m/hr:
time is already in hours so you just need to make convert the meters to kilometers. 

15,000\frac{m}{hr}  *  \frac{1km}{1,000m} = 15\frac{km}{hr}

Conversion of 4.3m/s
4.3  \frac{m}{s}  *  \frac{3,600s}{1hr}  *  \frac{1km}{1000m}  = 15.48 \frac{km}{hr}

Now that they are all the same value, you can see that Fred at 4.3m/s  was the fastest. 


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