KinematicsHard

Question

A particle is kept fixed on a turntable rotating uniformly. As seen from the ground, the particle goes in a circle , its speed is 20 cm/ and acceleration is 20 cm/s2. The particle is now shifted to a new position to make the radius half of the original value. the values of the speed and will be

Options

A.10 cm/s, 10cm/s2
B.10 cm/s, 80 cm/s2
C.40 cm/s, 10 cm/s2
D.40 cm/s, 40 cm/s2

Solution

    
ω and α remain same but v and aT is proportional to r thus at hlf the radius,
v′ = & aT′ =

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