Gravitational potential at x=2m is decreasing at a rate of 10J/kg−m along the positive x-direction. It implies that the magnitude of gravitational field at x=2m is also 10N/kg. Is this statement true or false?
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Solution
∣∣→E∣∣=√(−∂V∂x)2+(−∂V∂y)2+(−∂V∂z)2 (−∂V∂x)2=10J/kg-m is given No information is given about −∂V∂y and −∂V∂z So, ∣∣→E∣∣≥10 N/kg