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Ben and Olivia are pulling a rock of mass 100 kg across the ice, which is frictionless. Bea pulls with a force of 150.0 N

Ben and Olivia are pulling a rock of mass 100 kg across the ice, which is frictionless. Bea pulls with a force of 150.0 N [30.0^o N of E] while Olivia pulls with a force of 120 N [S]. The magnitude of the acceleration of the rock is _____ m/s².

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