Sum

The Earth is rotating with angular velocity ω about its own axis. R is the radius of the Earth. If Rω^{2} = 0 · 03386 m/ s^{2} , calculate the weight of a body of mass 100 gram at latitude 25°. (g=9·8m/s^{2}).

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#### Solution

Weight W =` m (g-Romega^2cos^2phi)`

`therefore W=0.1 (9.8-0.03386 xx cos^2 25)`

`therefore W=0.1 (9.8-0.0278)`

`therefore W=0.9772 N`

Concept: Angular Velocity

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