Question

Lawrence is conducting an experiment to see how much force it takes to push objects made of different materials along the ground. He uses a rubber object, a plastic object, a wooden object, and a glass object. He makes sure that each object is the same mass and that each object has the same amount of surface area in contact with the ground. He decides to test his objects on the same patch of cement under identical conditions for each trial.
Which of these are constants in Lawrence's experiment?

the amount of force he uses to push each object
the amount of surface area contacting the ground for each object
the type of surface he pushes each object along
the material each object is made out of
the mass of each object

Answer 1

The amount of force he uses to push each object.

Answer 2

Answer:the amount of surface area contacting the ground for each object

the type of surface he pushes each object along

the mass of each object

Explanation:

A constant in experiment can be a parameter which does not change it's form or value irrespective of changes occurring in the corresponding variables.

Able mentioned statements show the constants in the experiment.

The amount of force used to push the object is dependent variable. As it is required to be find out. The material each object made of is independent variable. It will exert influence over the force with which object was pushed.