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1) A 1500-kg car moving at 25m/s hits an initially uncompressed horizontal spring with spring constant of 2.0x10^6 N/m. What is the maximum compression of the spring? (Neglect the mass of the spring).

2) A constant 9.0N net force acts for 2.0s on a 6.0-kg object. What is the objects change of velocity?

3) A 2.0-kg mass moves with a speed of 5.0m/s. It collides head-on with a 3.0 kg mass at rest. If the collision is perfectly inelastic, what is the speed of the masses after the collision?

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