1. A certain force gives an object of mass  m1  an acceleration of 12.0 m/s² and an object of mass m2  an acceleration of 4.0 m/s². What acceleration would the force give to an object of mass  m1 + m2 ? _______m/s²

4. A ballot box with mass m = 6.0 kg slides with speed v = 4.0 m/s across a frictionless floor in the positive direction of an x axis. The box explodes into two pieces. One piece, with mass m1 = 2.0 kg, moves in the positive direction of the x axis at v1 = 8.0 m/s. What is the velocity of the second piece, with mass m2 ? _______m/s.

1. A certain force gives an object of mass m₁ an acceleration of 12.0 m/s² and an object of mass m₂ an acceleration of 4.0 m/s². What acceleration would the force give to an object of mass m₁ + m₂ ?

_______m/s²

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