June 2026
Beginner to intermediate
334 pages
8h 54m
English
Content preview from Make: Physics
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Chapter 7. Rotating Systems
In the last chapter, we introduced the concept of momentum, and explored how it was conserved. Rotating objects also have angular momentum, which is independently conserved if a body is moving and rotating simultaneously. Our ball bearings and marbles were rolling when they collided in the last chapter, but we ignored the effects this caused to focus on the linear momentum. To this point, we have focused on forces making objects move in a straight line, or in a gravity-driven arc. But what makes something start rotating? This chapter also introduces what happens when a force is applied such that it makes a body rotate, generating torque.
This chapter will focus on torque, and in the next chapter we will talk about ...
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