1401. At the top of the trajectory of projectile, the acceleration is :
A. Maximum
B. Minimum
C. Zero
D. g *
1402. For keeping a body in circular motion, the force required is :
A. Centripetal *
B. Centrifugal
C. Radial
D. Tangential
1403. In a uniform circular motion of a particle , the direction changes but not its :
A. Angular displacement
B. Magnitude of velocity
C. Force towards centre
D. B and C *
1404. The quantity mr2 is knwon as :
A. Moment arm
B. Moment of inertia *
C. Moment of force
D. None of these
1405. If a force acts on a body , whose action line does not pass through its centre of gravity , then he body will experience :
A. Angular acceleration
B. Linear acceleration *
C. No acceleration
D. None of these
1406. If the particle is moving in a circle of radius r with uniform angular velocity . the point among r and distracting speed is :
A. 0 Degree
B. 90 Degree *
C. 180 Degree
D. 270 Degree
1407. The orbital radius as the revolving body is revolving with low speed is :
A. Smaller
B. Larger *
C. Independent of speed
D. Equal to angular momentum
1408. The angular momentum of a particle having uniform velocity about a fixed origin :
A. Shifts with its position w.r.t the beginning
B. Varies with time
C. Remains constant *
D. Is zero
1409. The angular momentum is a vector quantity :
A. Perpendicular to the axis of rotation
B. Along the axis of rotation *
C. At the axis of rotation
D. None of these
1410. A body moving in circular motion with constant speed has :
A. Constant velocity
B. Constant acceleration
C. Constant kinetic energy *
D. Constant displacement