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A small ball is connected to a block by ...

A small ball is connected to a block by a light string of length l. Both are initially on the ground. There is sufficient friction on the ground to prevent the block from slipping. The ball is projected vertically up with a velocity u, where `2gl lt u^(2) lt 3gl`. The centre of mass of the block + ball' system is C.

A

C will move along a circle

B

C will move along a parabola

C

C will move along a straight line

D

The horizontal component of the velocity of the ball will first increase and then decrease.

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The correct Answer is:
A, D
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