A student tosses a 2 kg ball into the air 4 meters above his hand. Ignoring air friction, what will be the magnitude of the velocity of the ball when it returns to his hand?
A 1 m/s
B 2 m/s
C 8 m/s
D 10 m/s

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\[v _{f}^{2}=v _{i}^{2}+2a \Delta x\]

but you dont have any velocity

hmm but actually I'm getting 8.85 as my answer

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