Trial Number 1 2 3 Force sensor Initial Velocity of Cart X (m/s) 3 Meterstick 2 3 Initial Velocity of Cart Y (m/s) -1 -2 2 Final Velocity of Cart X (m/s) 0.7 -2 1.8 A student must conduct an experiment to verify the conservation of momentum for a closed two-cart system Cart X and cart Y travel toward each other and eventually collide, as shown in the figure. Data collected from the experiment are shown in the table. What additional measuring tool should the student have used in order to verify the conservation of momentum? Final Velocity of Cart Y (m/s) 4.7 2 2.8

Trial Number 1 2 3 Force sensor Initial Velocity of Cart X (m/s) 3 Meterstick 2 3 Initial Velocity of Cart Y (m/s) -1 -2 2 Final Velocity of Cart X (m/s) 0.7 -2 1.8 A student must conduct an experiment to verify the conservation of momentum for a closed two-cart system Cart X and cart Y travel toward each other and eventually collide, as shown in the figure. Data collected from the experiment are shown in the table. What additional measuring tool should the student have used in order to verify the conservation of momentum? Final Velocity of Cart Y (m/s) 4.7 2 2.8