1371. A particle moving along a circular path has instantaneous angular and linear velocities 30 rad/sec and 20 m/sec respectively-.The size of centripetal speed increase is :

A. 600 m/sec2 *
B. 60 m/sec2
C. 3/2 m/sec2
D. Data is incomplete

1372. A body travels an angular displacement 0= 10t+50t2. The magnitude of angular acceleration is :

A. 10 rad/s2
B. 20 rad/s2
C. 100 rad/s2 *
D. 150 rad/s2

1373. A centripetal power F follows up on body moving with rakish speed w. If the saucy speed is quadrupled, the degree of centripetal power becomes :

A. 16 F *
B. 15 F
C. 8 F
D. 32 F

1374. A 400N force acts on a body revolving at 20 Km/h. If the speed becomes 40 km/h after some time then magnitude of centripetal force is :

A. 800 N
B. 1600 N *
C. 400 N
D. 1200 N

1375. The centripetal force acting on a body rotating in a circle of radius r is F. In the event that the body moves surrounded by range half of the underlying worth keeping different amounts constant.then, by then, the rate change in centripetal power is :

A. 800 %
B. 100 % *
C. 400 %
D. 300 %

1376. Moment of inertia of rotating body depends upon :

A. Mass of the body only
B. Distribution of mass from the axis of rotation only
C. Both A and B *
D. Force only

1377. A Gymnast while showing feats is rotating with outreached hands, suddenly lower his hand along his body. The moment of inertia of gymnast will:

A. Increase
B. Decrease *
C. Remains constant
D. Becomes zero

1378. One newton-meter-second is equal to :

A. Joule
B. Joule-second *
C. Joule-meter
D. Kgm2/s2

1379. A 0.8 kg mass attached to the end of 0.5m long weightless ropes is whirled in a circle with angular speed 10 rad/s . The precise energy of the mass is :

A. 2 J-S *
B. 0.4 J-S
C. 0.2 J-S
D. 0.1 J-S

1380. The angular momentum of a body changes from 30 J-S to 50 J-S in 0.5 sec. The Force following up on it is :

A. 400 N m *
B. 500 N m
C. 100 N m
D. 150 N m