Question: The rectangular block with dimensions b and h is sliding to the left with velocity vo when it hits an obstruction at C , about

The rectangular block with dimensions

and

is sliding to the left with velocity

when it hits an obstruction at

,

about which the block pivots. What statement is true about the mechanical energy of the block before and after it hits the

obstruction at

.

The total mechanical energy has increased.The total mechanical energy has decreased.The total mechanical energy is unchanged.Not enough information is provided

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