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A 4 .O-kg block slides over the smooth, icy hill shown here. The top of the hill is horizontal and 70.0 m higher than the

A 4 .O-kg block slides over the smooth, icy hill shown here. The top of the hill is horizontal and 70.0 m higher than the base. What minimum speed must the block have at the base of the 70.0 m hill to pass over the pit at the far right

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