Friday, 23 March 2012

05:32 -

Mcq's test of Chapter 4 (motion in Two dimensios)


Q.01     In projectile motion the acceleration in the vertical direction is:
            a) Remains constant                 
b) Varies with time       
c) zero             
d) Is taken as positive

Q.02     The horizontal component of velocity of projectile is:
            a) Increases with time              
b) Decreases with time
c) Is uniform    
d) Is taken negative

Q.03     An object is launched in an arbitrary direction in space with certain initial velocity and it moves freely under gravity. Its path will be:
            a) Straight line                          
b) Circle                      
c) Parabola      
d) Hyperbola

Q.04     The velocity component with which a projectile covers certain horizontal distance is maximum at the moment of :
            a) Hitting the ground                
b) Highest point            
c) Projection    
d) None of these

Q.05     The velocity component with which a projectile covers certain Vertical distance is minimum at the moment of:
            a) Hitting the ground                
b) Highest point            
c) Projection    
d) None of these

Q.06     What is the angle of projection of projectile, for which its maximum height and horizontal range are equal?
            a) 30o                                      
b) 76o                          
c) 360              
d) 900

Q.07     The horizontal range of projectile depends upon the:
            a) Angle of projection               
b) Velocity of projection
c) Both a & b
d) None of these

Q.08     If a projectile is projected at an angle of 35o, It hits certain target. It will have the same range if it is projected at an angle of:
            a) 45o                                      
b) 55o                          
c) 65o              
d) 70o

Q.09     A ballistic missile is fired at 80 m/s at an angle of 30o with the horizontal. If g =10 m/s2 , then missile is air born for:
            a) 2 sec                                               
b) 22 Sec                     
c) 4 sec                       
d) 8 sec

Q.10     In projectile motion the acceleration along Y-axis is always taken as:
            a) Positive                                
b) Negative      
c) Uniform                   
d) Zero

Q.11     The direction of centripetal acceleration is always ------------- to the velocity vector.
            a) Parallel                                
b) Anti parallel 
c) Perpendicular           
d) None of these

Q.12     The product of the distance of the point from the axis of rotation and angular acceleration is called:
            a) Momentum              
b) Angular acceleration
c) Tangential acceleration
d) None of these

Q.13     The dimension of angular acceleration is:
            a) MLT-2                     
b) LT-1                         
c) T-2                           
d) LT2

Q.14     The relationship between angular and tangential velocity is:
            a) ω = Vr                     
b) V = ω/r                    
c) V= r/ ω                    
d) ω = V/r

Q.15     The formula for centripetal force is:
            a) F = mr2/V                
b) F = V2/mr                
c) F = mrω2                  
d) All of these

Q.16     Maximum height of projectile depends upon the:
            a) Square of velocity & angle
b) velocity & angle
c) Velocity                   
d) All of these

Q.17     A marter shell is fired with the velocity of 10 m/s at an angle of 45o, Calculate range of shell
            a) 11 m            
b) 11.2cm                                
c) 10.2 m                     
d) 10.2cm        

Q.18     π- radian is equals to:
            a) 360o                         
b) 180o                         
c) 90o                          
d) 45o

Q.19     The angle subtended at the centre of a circle by an arc equal in length to its radius is called
            a) 1 degree                  
b) 1 radian                   
c) 1 minute                   
d) 1 second

Q.20     The formula for total time of flight is:
            a) T= VoSin2θ/g           
b) T = 2 V0 Sin2θ/g      
c) T = 2 V0 Sinθ/g        
d) None of these