1.  The unit of momentum in the SI system is

      a) Newton-meter

      b) kg/s^2

      c) kg*m/s

2.  A ball of mass m = 1 kg moves at v = 1 m/s.
    Using the units for momentum from your answer to question 1,
    the momentum of this ball is 

      a) about 0.5    unit

      b) about 1.0    unit

      c) about 2.0    unit

3.  Momentum is very useful when dealing with collisions.

          True               False