Physics General Science Test Hard Mode

Sr. #	Questions	Answers Choice
1	What will be the duration of the day and night (in hour) if the diameter of the earth is suddenly reduced to half its original value the mass remaining constant?	12 6 3 2
2	In which case application of angular velocity is useful?	When a body is rotating When velocity of body is in a straight line When velocity is in a straight line None of these
3	A couple produces	Purely linear motion Purely rotational motion Linear and rotational motion No motion
4	Center of mass is a point	Which is geometric center of a body From which distance of particles are same Where the whole mass of the body is supposed to be centered Which is the origin of reference frame
5	If the earth were to rotate faster than its present speed the weight of an object will	Increase at the equator but remain unchanged at the poles Decrease at the equator but remain unchanged at the poles Remain unchanged at the decrease but decrease at the poles Remain unchanged at the equator but increase at the poles

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