1.Torque is the _______ effect produced by
  a force acting on a body: 
a)   Accelerating 
                     
                       
             
b)   Stopping 
c) 
   Lifting                 
                       
                      
d)   Turning 
 | 
  
A 
 | 
 
  
2.Torque is a vector quantity that produces
  _______ in a body: 
a)   Momentum 
                       
                       
              
b)   Angular
  acceleration 
c)   Angular
  momentum                   
                        
d)   Linear acceleration 
 | 
  
B 
 | 
 
  
3.Units of torque in the SI system are: 
a)   mS-1      
b)   mS 
c)   NS    
       
d)   Nm 
 | 
  
D 
 | 
 
  
4.Torque is also called: 
a)  
  Moment of force      
b)  
  Moment of the inertia 
c)  
  Centrifugal force      
d)  
  Centripetal force 
 | 
  
A 
 | 
 
  
5.The shortest distance between the line of
  action of the force and the origin (fixed point) is called: 
a)  
  Moment               
b)  
  Moment arm 
c)  
  Position vector    
d)  
  Radius vector 
 | 
  
B 
 | 
 
  
6.For given values of F and r, the magnitude of
  the torque will be maximum when the angle between them is: 
a)  
  30o   
        
b)  
  45o 
c)  
  60o   
      
d)  
  90o 
 | 
  
D 
 | 
 
  
7.By convention, torques producing
  anti-clockwise rotation are taken as: 
a)  
  Positive         
b)  
  Negative 
c)  
  Zero               
d)  
  None of the above 
 | 
  
A 
 | 
 
  
8.Two equal and anti-parallel forces acting
  on a body form a _______. 
a)  
  Pair          
b)  
  Couple 
c)  
  Torque                    
                       
                    
d)  
  Moment 
 | 
  
B 
 | 
 
  
9.If the distance between the lines of
  action of two forces forming a couple and having a magnitude F is L, then the
  magnitude of the couple is: 
a)  
  1/2FxL                    
                       
                   
b) 
   L 2FxL 
c) 
   FxL                  
                       
                       
     
d)   
  FxL2 
 | 
  
C 
 | 
 
  
10.The point in a body at which an applied
  force produces linear acceleration but no rotation is called its: 
a)  
  Geometric centre   
b)  
  Centre of gravity 
c)  
  Centre of mass       
d)  
  Core 
 | 
  
C 
 | 
 
  
11.During the motion of a rigid body, its
  centre of mass describes only: 
a)  
  Translational motion         
b)  
  Rotational motion 
c)  
  Vibrational motion          
d)  
  Rotational and translational motion 
 | 
  
A 
 | 
 
  
12.The point on which the weight of a body
  acts is called its: 
a)  
  Centre of gravity    
b)  
  Centre of mass 
c)  
  Geometric centre   
d)  
  Core 
 | 
  
A 
 | 
 
  
13.If the gravitational field is uniform
  the centre of mass and centre of gravity of a body: 
a)  
  Are opposite to each other   
b)  
  Lie in the same line 
c)  
  Coincide with each other   
d)  
  Have no relation with each other 
 | 
  
C 
 | 
 
  
14.Angular momentum and moment of inertia
  are related to each other by the relation: 
a) 
   I=LxwI         
b) 
   I=Lw2 
c) 
   L=Ixw                  
                       
                       
d)   I=L2w 
 | 
  
C 
 | 
 
  
15.The magnitude of angular momentum can be
  found by the expression: 
a)  
  mrw                    
                       
                        
b)  
  mrw2 
c) 
   m2rw  
     
d)  
  mr2w 
 | 
  
D 
 | 
 
  
16.If a particle moves in a circular orbit
  with constant speed, its angular momentum about the centre of the circle: 
a)  
  Change with time         
b)  
  Depends on its angular displacement 
c)  
  Remains constant    
d)  
  Depends on its angular velocity 
 | 
  
C 
 | 
 
  
17.The angular momentum of a particle
  having uniform velocity about a fixed origin: 
a)  
  Varies with its position w.r.t. the origin  
b)  
  Varies with time 
c)  
  Remains constant         
d)  
  Is zero 
 | 
  
C 
 | 
 
  
18.According to the law of conservation of
  angular momentum, the angular momentum of a rotating body or system of bodies
  is constant if no external _______ acts on the body about that axis: 
a)  
  Torque              
b)  
  Force 
c)  
  Couple        
d)  
  Moment of inertia 
 | 
  
A 
 | 
 
  
19.Torque is also called as: 
a)  
  Moment of inertia      
b)  
  Moment of momentum 
c)  
  Moment of force          
d)  
  Quantity of motion 
 | 
  
B 
 | 
 
  
20.A diver uses the law of conservation of
  momentum when he curls his body while diving so as to: 
a)  
  Make his jumping time shorter  
b)  
  Plunge into water at a farther point 
c)  
  Make one or two extra somersaults   
d)  
  Jump into the water more safely 
 | 
  
C 
 |