$(a)$ Write the formula to find the magnitude of the gravitational force between the Earth and an object on the surface of the Earth.
$(b)$ What is the direction of acceleration due to gravity?
$(b)$ What is the direction of acceleration due to gravity?
(N/A) The formula for the gravitational force is $F = \frac{G M m}{R^2}$,where $G$ is the universal gravitational constant,$M$ is the mass of the Earth,$m$ is the mass of the object,and $R$ is the radius of the Earth.
$(b)$ The direction of acceleration due to gravity is always towards the centre of the Earth.
$(b)$ The direction of acceleration due to gravity is always towards the centre of the Earth.
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