Equilibrium of Rigid Bodies, Rigid Body Rotation and Equations of Rotational Motion NEET Questions

Physics - Rotational Motion

Equilibrium of Rigid Bodies, Rigid Body Rotation and Equations of Rotational Motion MCQ Questions


13.
A wheel initially rotating at 10 rad/s comes to rest in 5 s under a constant retardation. The magnitude of angular retardation is:
A.
1 rad/s²
B.
50 rad/s²
C.
5 rad/s²
D.
2 rad/s²
😑 View Answer Rough Work Error
ANSWER :
D. 2 rad/s²
14.
A wheel rotating at 600 rpm is brought to rest in 1 minute by a constant retarding torque. The total number of revolutions made by the wheel before stopping is:
A.
300
B.
150
C.
600
D.
200
😑 View Answer Rough Work Error
ANSWER :
A. 300
15.
A flywheel starts from rest and reaches an angular speed of 100 rad/s in 10 s under constant α. The angle (radians) turned through in this time is:
A.
100 rad
B.
500 rad
C.
1000 rad
D.
50 rad
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ANSWER :
B. 500 rad
16.
The angular speed of a motor wheel is increased from 1200 rpm to 3120 rpm in 16 s. Its angular acceleration (assumed uniform) is:
A.
2π rad/s²
B.
π rad/s²
C.
8π rad/s²
D.
4π rad/s²
😑 View Answer Rough Work Error
ANSWER :
D. 4π rad/s²
17.
In the previous problem (motor wheel: 1200→3120 rpm in 16 s with α = 4π rad/s²), the total number of revolutions completed in those 16 s is:
A.
288
B.
144
C.
1152
D.
576
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ANSWER :
D. 576
18.
If a body rotating with angular speed ω₀ has α = 0, then:
A.
It accelerates uniformly
B.
Its angular velocity doubles each second
C.
It comes to rest
D.
It rotates with constant angular velocity
😑 View Answer Rough Work Error
ANSWER :
D. It rotates with constant angular velocity