Question

a student wants to design an activity to study how the gravitational force on an object changes with mass. he plans to drop various objects and then record the time taken by each object to reach the ground. which step is the most logical to include in the design of the activity? take two books of equal masses and drop them together from the same height. take two books of different masses and drop them together from the same height. take two books of equal masses and drop them one after the other from different heights. take two books of different masses and drop them one after the other from different heights.

Explanation:

To study how gravitational force on an object changes with mass, we need to vary the mass while keeping other factors (like height) constant. By dropping two books of different masses from the same height simultaneously, we can observe the effect of mass on the motion under gravity, eliminating the confounding variable of height.

Answer:

Take two books of different masses and drop them together from the same height.