A student must design an experiment to determine the gravitational mass of an object. Which of the following experiments could the student use? Select two answers.
Place the object on one side of a lever at a known distance away from a fulcrum Place known masses on the other side of the fulcrum so that they are also placed on the lever distances from the fulcrum. Move the known masses to a known distance such that the lever is in statie brium known
Place the object on a surface of negligible friction and pull the object horizontally across the surface with a spring scale at anonconstant speed such that a motion detector can measure how the object's speed as a function of time changes Place the object on a surface that provides friction between the object and the surface. Use a surface such that the coefficient of friction between the object and the surface is known.
Put the object horizontally across the surface with a spring scale at a nonconstant speed such that a motion detector can measure how the object's speed as a function of time changes
Place the object on the end of a vertically hanging spring with a known spring constant. Allow the spring to stretch to a new equilibrium position and measure the distance the spring is stretched from its original equilibrium position