Question

a group of students were asked to investigate how gravity affects the acceleration of an object on earth. the students set up their investigation using the following steps and recorded the data. 1. measure four meters and mark each meter. 2. push a toy car with a small amount of force. 3. time how long it will take the toy car to travel four meters, recording the time at each meter. 4. repeat the procedure for two more trials. which suggestion best extends the investigation to gather data that can be used to answer the teachers question? oa the students could repeat the investigation using a car with a larger mass. ob the students could restart the investigation, measuring the time at every 50 centimeters. oc the students could restart the investigation, extending the distance observed to 10 meters. od the students could repeat the investigation while increasing the amount of force exerted by the student pushing the car.

Explanation:

The students are investigating the acceleration of an object (toy car) due to gravity. To answer the teacher's question about how gravity affects acceleration, they need to vary a relevant factor. Mass is related to gravitational force (\(F = mg\), where \(F\) is force, \(m\) is mass, and \(g\) is acceleration due to gravity). By using a car with a larger mass (Option A), they can explore the relationship between mass (affected by gravity as \(F = mg\)) and acceleration (\(a=\frac{F}{m}\), when \(F\) is gravitational - related force). Other options (B: measuring time at every 50 cm is just a measurement - interval change; C: extending distance to 10 m is a distance - related change; D: increasing force is an external - force change not directly related to the gravitational - mass relationship for answering the given question about gravity's effect on acceleration) do not directly address the gravitational - mass - acceleration relationship as Option A does.

Answer:

A. The students could repeat the investigation using a car with a larger mass.