350 times 3 = 1,050
their final velocity is 0.48 m/s.
we can use conservation of momentum to calculate the magnitude of the final velocity.
momentum before collision is equal to the momentum after collision
here, v is final velocity , assuming right side velocity as positive, and left side velocity as negative.
here, negative sign indicates that they both will move in left direction.
'd' is the scalar. it has size but no direction. the other choices have directions too, so those are vectors.
a. an adult uses a timer to make sure that the time-out is...