2)a stone of mass 1kg tied to one end of a string of length 1m whirld in a horizontal circle with a costant speed 2 radian/second tension of the string is. A)0.5n b)1n c)2n d)4n 3)the orbital velocity of a satelight close to the earth is v then the orbital velocity at a height 1/4th of earths radius is a)2v/5 b)5v/2 c)2v/{5} d){5}v/2 4)the length of a pendulunm is halvd is energy will a)decreased 2half b)increased to 2 times c)decreased to 1/4th d)increased to 4 times
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