Answer:
Ruler/tape and stopwatch
Weighing balance
Explanation:
Since for momentum, we're concerned with mainly mass and velocity of an object then you will need weighing balance calibrated with the most accurate unit (normally grams or kilograms). The weighing balance will therefore be useful in measuring mass. To obtain velocity, you need to get distance that an object moves and divide it by time taken for the movement. Therefore, a tape or rule will be useful in measuring distance moved in meters while stopwatch will help you get time taken which consequently you use to get velocity.
