A small velocity means the car will stop at a shorter distance. Hence the distance will decrease.
The ramp will be set up as in the previous lab experiment with the ramp raised 45 cm above the floor. The meter rule will be stacked at the center of the ramp with its zero mark placed at the bottom end of the ramp. An ultrasound reflector will be taped at the back of the model car. The mass of the car is then measured and recorded. A book of about 300g is placed at the 30cm mark from the bottom end of the ramp. The motion detector is fixed at the higher end of the ramp according to the setup in the lab manual. The motion detector is channeled to the computer interface through channel one. The computer is then set for data acquisition. The car is placed at the 80 cm mark on the meter rule. The car is released simultaneously with the sound from the detector. After the car hit the book the distance which the book moves is recorded. Repeat twice and find average of the distance the book moved. The whole procedure is repeated but now with a book of 600g.
To confirm the results for question , we repeat the above procedure but now recording average velocity of the car weighing 500g. The procedure is repeated but with a car of mass 1000g. Again the average velocity of the car is recorded. These velocities are used to calculate the momentum of the car at the time of