1 
The formula of torque is: 
 A. L= F x E
 B. E = F x t
 C. t = F x L
 D. E = F x L

2 
It base of a right angled triangle is 3 cm and its perpendicular is 3 cm.Then its hypotenuse will be 
 A. 2 cm
 B. 4 cm
 C. 6 cm
 D. 5 cm

3 
A couple consists of which type of forces : 
 A. Like parallel
 B. Unlike parallel
 C. Not parallel
 D. Nil

4 
Forces on doubled arm spanner are called. 
 A. Torque
 B. Couple
 C. Moment of force
 D. Momentum arm

5 
The turning effect of force is called: 
 A. Torque
 B. Parallel force
 C. Equilibrium
 D. Couple

6 
The resultant vector of given vectors A and B is 

7 
_____________ is centre from which its mass is equally distributed: 
 A. Cebtre of mass
 B. Centre of gravity
 C. All of above
 D. None

8 
The single force that has the same effect as the combined effect of all the force to be added is called a 
 A. Opposite force
 B. Single force
 C. Resultant force
 D. Resultant vector

9 
Unit of Resultant force is: 
 A. Nm<sup>2</sup>
 B. N.m
 C. Nm<sup>1</sup>
 D. N

10 
A force of 10 N is making and angle of 30<sup>o</sup>with the horizontal. Its horizontal component will bw: 
 A. 4 N
 B. 5 N
 C. 7 N
 D. 8.7 N
