I got a 7 for my Physics HL IA in 2020. The topic was “The effect of different roughness of surfaces on the tipping height of a rectangular box.”


[Table of contents]


[Sample excerpts]

1. Introduction

Throughout the first year of the IB physics course, I have touched on many fundamentals of physics, such as electromagnetism, kinematics, and rotational motion. And while researching for an Internal Assessment topic, I have found out that there is a different type of rotational motion that consists of a change in the location of forces. I found this quite intriguing, mainly because this force, torque, had a unit similar to that of energy yet had some distinguishable characteristics.

In this essay, I will focus on the following research question: “how does the tipping point of a rectangular box change on different surfaces?” The relationship between the type of surface and the tipping point was examined experimentally using a ruler and a protractor. First, it is essential to explore some key concepts regarding the subject of the essay.

2. Background Information

2.1 Normal force

Normal force is a force in line with Newton’s third law of motion, which states that “for every action, there is an equal and opposite reaction.” Normal force is a contact force and is defined as a force acting upon an object that is in contact with a surface. This force enables objects to lie on a surface without causing the surface to collapse due to the gravitational force exerted on the
object (Helmenstine, 2019)…


  • Total number of pages:  16 pages
  • Topic: The effect of different roughness of surfaces on the tipping height of a rectangular box
  • Subject: Physics
  • The file is in Word format