In the context of the experiment to study the effect of a net force applied to an object on its motion, the two other measurements the students should take in each trial, along with the applied net force, are mass and acceleration.
This is because, according to Newton's second law of motion (F = ma), the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. By measuring these quantities, students will be able to analyze how the net force influences the object's acceleration based on its mass. Thus, the correct response is:
mass and acceleration.