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The ball, with a mass of m = 0.3 kg, is stretched on a horizontal plane from its unstretched position at A to the spring’s maximum, at which the ball’s distance to point O will be 400 mm. If it is launched at v1 as shown, what must the spring constant k be?

200 mm
=
¹7
V₁ = 2 m/s
m
PINNIN
0
60°
Horizontal plane

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