# Minimum speed

A particle projected from the ground passes two points, which are at height $$h_{1}=12 m$$ and $$h_{2}=18 m$$ above the ground and at a horizontal distance $$d=8 m$$ apart (diagonal distance $$10 m$$ apart). What could be the minimum speed $$u$$ of projection?

• $$g =10 m/s^2$$. All other force are neglected.

• $$u$$ is in $$m/s$$

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