Mechanics, Properties of Matter and Sound

1.      The Kinetics energy of rotation is given by

•  a) 1/2 mv²     

• b) ½ Iω²    

• c) mc² 

• d) mgh

2.  The principle of rocket is

 

• a) Conservation of mass                             

•  b) conservation of angular momentum

•     c ) conservation of linear momentum         

• d) conservation of energy

3. The dimension for torque  is

• a) MLT-²                   

•  b) ML²T-²               

•  c) MLT-^1`     

• ^`     d)  ML²T-¹

4.  Power is measured in

• a) Watt                                  

•   b) m      

•  c) Joule  

•     d) cm

5. Gravitational constant G is

• a) 6.668 * 10-¹¹                 

•   b) 6.66 * 10¹¹      

•  c) 66.6 * 10¹¹  

•  d) 66.6 * 10-¹¹

6. The  poisson ratio varies between

 

• a)   0 to 1                         

• b) 0 to 0.5       

• c) 0.5 to 1 

•    d)  none of these

7. The frequency of ultrasound waves is

 

• a) Less than 20 Hz           

   

• b) equal to 20 KHz     

• c) greater than 20 KHz 

•    d)  none of the above

8.  The unit of moment of interia is

• a)      Kg-m        

• b) kg-m²    

•   c) kg²-m        

•   d) kg²-m²

9. The substance  which exhibits practically no elastic after effects is

 

• a)      Copper 

   

• b) silk 

• c) rubber

• d) quartz

10. Discovered   a  universal  law  of gravitation

• a)      Newton     

•    b) Planck       

•   c) Curie       

• d) Kepler