Question

5: Calculate the angular speed of rotation of the Earth so that the apparent g at the equator becomes
zero. Also calculate the length of the day in this situation.​

Answer 1

Answer:

For apparent g at equator to be 0,

mω

2

R−mg=0

ω=

R

g

=

6400000

9.8

=1.24X10

−3

rad/s

Also, length of day is equal to the time of one rotation.

Hence, T=

ω

2π

=

1.24X10

−3

2π

=5067.74s=1.41hr

Answer is 1.41hr.