It gives us the property of weight and determines much about the motion of objects in our daily lives. It explains why a dropped ball falls to the ground and why our planet orbits the Sun. ![]() The gravitational force is most familiar to us because it describes so many of our common observations. Later, this will be a useful tool to discuss why the weak force isn’t the weakest force and should provide students a greater appreciation for the discovery of science. Refer to their rankings as you present the section. Prior to beginning the lesson, have students predict the relative strengths of the four forces, from weakest to strongest.Discussions of the strong and weak nuclear forces are designed to help them understand particle organization and particle decay. Remind them that nearly all of their daily observations and interactions are due to the gravitational and electromagnetic forces and that this chapter will not be un-teaching their prior lessons. Some students may be disheartened by the idea that two of the four fundamental forces have barely been discussed in the course.The four fundamental forces are gravity, electromagnetism, weak nuclear force, and strong nuclear force. These four basic forces are known as fundamental because they alone are responsible for all observations of forces in nature. They describe the true cause behind familiar terms like friction and the normal force. These forces describe the movement of galaxies, the chemical reactions in our laboratories, the structure within atomic nuclei, and the cause of radioactive decay. These forces are responsible for all interactions known to science: from the very small to the very large to those that we experience in our day-to-day lives. Additionally, it may be valuable to review gravitational and electric fields, Rutherford’s gold foil experiment, the Van de Graaff generator, particle decay, and the impulse-momentum theorem.ĭespite the apparent complexity within the universe, there remain just four basic forces. ![]() Prior to the section, have students create a list of different forces.
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