**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