The picture below shows Peggy's new racetrack. It has different starting positions and an upside-down loop for cars to go through. She has 3 cars that she wants to try on the track: a sports car, a truck, and a jeep.

Question

Peggy knows that height can change how fast a car will go. Which experiment will help Peggy choose the starting position that allows every car to complete the loop?
A.

an experiment where Peggy drops each car from different starting heights multiple times and records which heights allow all three cars to complete the loop every time

B.

an experiment where Peggy drops each car from the same starting height and measures the amount of time it takes each car to complete the loop

C.

an experiment where Peggy drops each car from different starting heights multiple times and measures how far each car goes on the course after completing the loop

D.

an experiment where Peggy drops each car from the same starting height and records which cars complete the loop from that height

Answer 1

To determine which starting position allows every car to complete the loop, Peggy needs to conduct an experiment that tests multiple starting heights for each car. This way, she can evaluate if there are specific heights that allow all cars to complete the loop successfully without missing it.

The best choice for this goal is:

A. an experiment where Peggy drops each car from different starting heights multiple times and records which heights allow all three cars to complete the loop every time.

This choice allows Peggy to gather comprehensive data on how different starting heights affect the performance of each car, ensuring she finds the optimal height for all three cars to complete the loop successfully.