Question

# A wheel starting from rest, rotates with 5 rad/s2 angular acceleration along its axis. After 2 s of motion, the magnitude of radial and tangential component of acceleration of the particle at a distance 2 cm from the axis are ________ and ________ cm s−2.200,550,10100,5200,10

Solution

## The correct option is D 200,10Given, α=5 rad/s2,t=2 s and r=2 cm Now to find the radial and tangential component of the acceleration at=rα=5×2=10 cm/s2 (∵ω=ω0+αt=0+5×2=10 rad/s) ar=rω2=2×102=200 cm/s2 Hence option D is the correct answer

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