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Question

Find the acceleration of a particle placed on the surface of the earth at the equator due to earth's rotation. The diameter of earth = 12800 km and it takes 24 hours for the earth to complete one revolution about its axis.

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Solution

Diameter of the Earth = 12800 km
So, radius of the Earth, R = 6400 km = 6.4 × 106 m

Time period of revolution of the Earth about its axis:

T=24 hr=24×3600 sv=2πrT=2×3.14×64×10624×3600
v=465.185 m/s

Acceleration of the particle:a=v2R=465.185264×105=0.038 m/s2

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