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AIIMS 2017 Physics Question Paper for free online practice with solutions
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© examsnet.com
Question : 5
Total: 60
The wheel of a car is rotating at the rate of 1200 revolutions per minute. On pressing the accelerator for 10 seconds it starts rotating at 4500 revolutions per minute. The angular acceleration of the wheel is
30 radian /
second
2
1880 degree/
second
2
1780 degree/
second
2
1980 degree/
second
2
Validate
Solution:
α
=
ω
2
−
ω
1
t
2
−
t
1
ω
1
=
2
π
×
1200
60
=
40
π
.
ω
2
=
2
π
×
4500
60
=
150
π
α
=
110
π
10
rad
∕
s
e
c
2
Now, π radian = 180°
∴ 1 rad = 180/π degree
∴
α
=
11
π
×
180
π
degree
∕
s
e
c
2
=
1980
degree
∕
s
e
c
2
© examsnet.com
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