Step-by-step explanation:
Momentum before = momentum after
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
(60 kg) (0 m/s) + (70 kg) (0 m/s) = (60 kg) v + (70 kg) (1.0 m/s)
v = -1.2 m/s
Her velocity would be 1.2 m/s in the opposite direction.
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