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Rohini Goyal
Asked: 2022-11-05T03:46:16+05:30 In:

A disc of mass 2 kg and diameter 40 cm is free to rotate about an axis passing through its centre and perpendicular to its plane. If a force of 50 N is applied to the disc tangentially Its angular acceleration will be
A. `100 rad//s^(2)`
B. `25 rad//s^(2)`
C. `250 rad//s^(2)`
D. `500 rad//s^(2)`

A disc of mass 2 kg and diameter 40 cm is free to rotate about an axis passing through its centre and perpendicular to its plane. If a force of 50 N is applied to the disc tangentially Its angular acceleration will be
A. `100 rad//s^(2)`
B. `25 rad//s^(2)`
C. `250 rad//s^(2)`
D. `500 rad//s^(2)`
Parabola
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  1. Correct Answer – C
    `tau = I alpha`
    `therefore alpha =(tau)/(I)=(rF)/(I)=(0.2xx50)/(mR^(2)/2)=(10xx2)/(2xx0.2xx0.2)`
    `= 250 rad//s^(2)`

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