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Intensity of gravitational field of earth is maximum at

Answer» <html><body><p> Poles</p><br/><br/><p>A perfect <a href="https://interviewquestions.tuteehub.com/tag/sphere-1222094" style="font-weight:bold;" target="_blank" title="Click to know more about SPHERE">SPHERE</a> of spherically uniform density (density <a href="https://interviewquestions.tuteehub.com/tag/varies-1443299" style="font-weight:bold;" target="_blank" title="Click to know more about VARIES">VARIES</a> solely with distance from centre) would produce a gravitational field of uniform magnitude at all points on its surface, always pointing directly towards the sphere’s centre. However, the Earth deviates slightly from this ideal, and there are consequently slight deviations in both the magnitude and direction of gravity across its surface. Furthermore, the net force exerted on an object due to the Earth, called “effective gravity” or “apparent gravity”, varies due to the presence of other factors, such as inertial response to the Earth’s rotation. A scale or plumb <a href="https://interviewquestions.tuteehub.com/tag/bob-399946" style="font-weight:bold;" target="_blank" title="Click to know more about BOB">BOB</a> measures only this effective gravity. The major reason for the difference in gravity at different latitudes is that the Earth’s equatorial bulge (itself also <a href="https://interviewquestions.tuteehub.com/tag/caused-7279664" style="font-weight:bold;" target="_blank" title="Click to know more about CAUSED">CAUSED</a> by inertia) causes objects at the Equator to be farther from the planet’s centre than objects at the poles. Because the force due to gravitational attraction between two bodies (the Earth and the object being weighed) varies inversely with the <a href="https://interviewquestions.tuteehub.com/tag/square-650836" style="font-weight:bold;" target="_blank" title="Click to know more about SQUARE">SQUARE</a> of the distance between them, an object at the Equator experiences a weaker gravitational pull than an object at the poles.</p></body></html>


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