Physicshard · Past Paper
What is the displacement of a point on the rim of a wheel of radius R when the wheel rolls forward half a revolution?
A2R
Bpi*R
CR*sqrt(pi^2 + 4)
DR*sqrt(pi^2 + 1)
✓ Correct Answer: C — R*sqrt(pi^2 + 4)
Horizontal distance = pi*R, vertical distance = 2R. Resultant displacement = sqrt((pi*R)^2 + (2R)^2) = R*sqrt(pi^2 + 4).
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