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Explore innovative teaching strategies for rotational motion. Engage students through a fun outside activity where they form a line, linking arms while one end stays fixed, rotating around to experience movement. They'll learn to keep the line straight, analyze different positions in the line, and understand the distinction between rotational motion and circular motion. Introduce crucial vocabulary and relate it to linear motion concepts like acceleration, velocity, and displacement. Rewriting equations with new terminology enhances comprehension of the principles at play.
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MECHANICS 2 Rotational Motion
Teaching Ideas • Outside – object rotating about a fixed position (line of students link arms, one end stays fixed and the rest sweep around in a circle) • Can you keep the line straight? • Mix up where you are in the line to experience the rotation from a different position • Is it easier to rotate about the person in the centre of the line?
New vocab! • What are the 3 typical ways we can describe the LINEAR motion of an object? Acceleration Velocity Displacement
Rotational motion words θ d = displacement(m) θ= angular displacement (rad) v = velocity (ms-1) ω= angular velocity (rads-1) v = ∆d= ∆θ ∆t ∆t a = acceleration (ms-2) α= angular acceleration (rads-2) a=∆vα=∆ω ∆t ∆t
d d=r Relationship between distance and angular displacement when θ in radians θ v=r a=rα
Teaching Idea • Re-write equations of motion with the new terminology for rotational motion • Build up the four EoM using the jigsaw pieces • Replace the three (/four) variables with our new variables
