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

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

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

13.

A wheel initially rotating with an angular velocity of 10 rad/s comes to rest in 5 s under constant angular deceleration. What is the magnitude of its angular deceleration?

A.

1 rad/s²

B.

50 rad/s²

C.

5 rad/s²

D.

2 rad/s²

ANSWER :

D. 2 rad/s²

14.

A wheel rotating at 600 rpm is brought to rest in 1 minute by a constant opposing torque. What is the total number of revolutions completed by the wheel before it comes to rest?

A.

300

B.

150

C.

600

D.

200

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
ANSWER :
B. 500 rad
16.

The angular speed of a motor’s wheel increases from 1200 rpm to 3120 rpm in 16 s. What is the wheel’s uniform angular acceleration?

A.

2π rad/s²

B.

π rad/s²

C.

8π rad/s²

D.

4π rad/s²

ANSWER :

D. 4π rad/s²

17.

In the previous problem, the angular speed of a motor’s wheel increases uniformly from 1200 rpm to 3120 rpm in16 s, with an angular acceleration of 4π rad/s2. What is the total number of revolutions completed during this 16-second interval?

A.

288

B.

144

C.

1152

D.

576

ANSWER :

D. 576

18.

If a body rotating with angular speed ωâ‚€ has angular acceleration 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

ANSWER :

D. It rotates with constant angular velocity