Sputnik

The first Earth satellite was flying at speed 8000 m/s. At that rate he circled the earth in 82 minutes. Jet flies at an average speed 800 km/h. How long would it take circle the earth round?

Correct result:

t =  49.2 h

Solution:

v1=8000/1000 3600=28800 km/h v2=800 km/h t1=82/60=41301.3667 h t=v1/v2 t1=28800/800 1.3667=2465=49.2=2465 h=49.2 h  s1=s2 s1=v1 t1=28800 1.3667=39360 km t2=s1/v2=39360/800=2465=49.2 h



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