Gravitational field strength at the surface of a planet The gravitational field strength (g) due to an object is given by The gravitational field strength at a point is the force per unit mass experienced by a test mass at that point. The gravitational force between two objects can be calculated using Newton’s universal law of gravitation It is directed towards the center of the circular motion and is perpendicular to the instantaneous velocity of the object. The acceleration which gives rise to a circular motion is called the centripetal acceleration. Centripetal force is not a type of force rather, it is just the name we give to the net force causing a circular motion.Direction: Pointing towards the center of the circle / perpendicular to the instantaneous velocity.The frequency can be calculated by 1/period and is usually measured in Hz.Ĭentripetal force is the corresponding force (resultant force) which causes the centripetal acceleration. The period is the time taken for the object to complete one full circle and is usually calculated in seconds. The acceleration causing this change in velocity is always directed towards the center of the circular path.
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