Answer the following questions 1-4 on the diagram at right which shows an object

Question

Answer the following questions 1-4 on the diagram at right which shows an object with a mass of 1.Kg attached to a string 0.5 m long. The object is moving at a constant speed of 5.0m/s in a horizontal circular path with a center at point O. What is the magnitude of the centripetal force acting on the object? 2.5N 10N 25N 50N While the object is undergoing uniform circular motion, it acceleration has a magnitude of zero Increases in magnitude Is directed toward the center of the circle I directed away form the center of the circle If the string is cut when the object is at the position shown, the path the object will travel from this positions willow be toward the center of the circle A straight line tangent to the circle If the string is lengthened while the speed of the object remains constant, the centripetal acceleration of the object will Decrease Increase Remain the same Compared to the mass of an object at the surface of the Earth, the mass of the same object at a distance of two Earth radii from the center of the Earth is The same Twice as great as great as great If the Earth were twice as massive as it is now, the gravitational force between it and the Sun would be The same Twice as great 1/2 as great 4 times as read

Explanation / Answer

Hence mass at the surface of the earth and the mass at the distance far away from the earth is equal. Thus option A) The same is correct.

F = Gm1m2/r^2

Thus if any one mass is increased any factor say n , F will be increased by that factor.

Hence if mass is twice as before , F will be twice as before.

So, option B)  Twice as great is correct.

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