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2) A mass of 4 kg is moving at 9 m/s in the +x direction which...

2) A mass of 4 kg is moving at 9 m/s in the +x direction which collides inelastically with a mass (mass 2) of 7 kg. After the collision, the masses are moving at 3 m/s in the +x direction. What is the average force on mass 2 in Newtons if the collision takes 0.1 seconds? If in the negative x direction, include a negative sign.

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