A uniform disc of radius 50 cm starts from rest and undergoes constant angular acceleration 2 rad/s². Find the magnitude of net acceleration of a rim point after 2 s.
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A uniform disc of radius 50 cm starts from rest and undergoes constant angular acceleration 2 rad/s². Find the magnitude of net acceleration of a rim point after 2 s.

G1 Physics · Accepted Answer

Step 1: At t=2 s, ω=αt=4 rad/s. Step 2: Tangential acceleration aₜ=αR=1 m/s² and radial acceleration aᵣ=ω²R=8 m/s². Step 3: Total acceleration =√(1²+8²)=√65≈8.06 m/s². Final answer: D — 8.0 m/s².