Question: A 2-kg-block is pushed upward from underneath by a constant 50-N vertical force. The block is sliding on the bottom side of an incline

A 2-kg-block is pushed upward from underneath by a constant 50-N vertical force. The block is sliding on the bottom side of an incline plane that makes an angle of 70 with the vertical. The coefficient of kinet- ic friction between the block and the plane is 0.2. If after traveling a total distance of 4 m the block is traveling at a speed of 4.443 m/s up the in- cline, what was the initial speed of the block?

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