Questions
How many hours would make a day if the Earth were rotating at such a high speed that the weight of a body on the equator were zero?
a
6.2 h
b
1.4 h
c
28 h
d
5.6 h
detailed solution
Correct option is B
mg=mRω2R= radius of earth ω=gRT=2πRg=2π640000 =2π×800s=2π×8003600h=1.39h=1.4hTalk to our academic expert!
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The angular speed of earth, so that the object on equator may appear weightless, is , radius of earth 6400 km)
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