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Byju's Answer
Standard XII
Physics
Angular Acceleration
A disk has ro...
Question
A disk has rotational inertia 1.22 x 10
−
3
kg-m
2
and is attached to an electric drill whose motor delivers a torque of 15.8 N-m.
The angular speed v of the disk 33 ms after the motor is turned on is:
A
2.83
×
10
4
rad/s
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B
3.32
×
10
6
rad/s
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C
3.48
×
10
4
rad/s
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D
8.54
×
10
4
rad/s
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Solution
The correct option is
C
3.48
×
10
4
rad/s
τ
=
I
α
α
=
1.162
×
10
6
r
a
d
/
s
e
c
2
ω
=
α
t
ω
=
3.48
×
10
4
r
a
d
/
s
e
c
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