before and after are given, and no other unbalanced forces act on these blocks. The collision is8) In the figure, determine the character of the collision. The masses of the blocks, and the velocities2.1 m/s9 kg0.6 m/sBefore1.5 m/s1.5 m/s3 kgA) perfectly elastic..D) characterized by an increase in kinetic energy.E) not possible because momentum is not conserved.B) partially inelastic..AfterC) completely inelastic.9) A 4.5 kg experimental cart undergoes an acceleration in a straight line (x-axis). The graph shows theacceleration as a function of time. When is the net force equal to zero?A) at 0s and 6 s, B) at 0s and 2 s, C) at 2 s and 4 s, D) at 4 s and 6 sa (m/s²)10.05.0-0204.06.01(s)

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