# Which is the correct statement about law of polygon of forces ?

A. if any number of forces acting at a point can be represented by the sides of a polygon taken in order, then the forces are in equilibrium

B. if any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium

C. if a polygon representing forces acting at a point is closed then forces are in equilibrium

D. if any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are

E. none of the above

**The unit of power in S.I. units is______________?**

A. newton meter

B. watt

C. joule

D. kilogram meter/sec

E. pascal per sec

**Forces are called coplanar when all of them acting on body lie in________________?**

A. one point

B. one plane

C. different planes

D. perpendicular planes

E. different points

**Effect of a force on a body depends upon________________?**

A. magnitude

B. direction

C. position or line of action

D. all of the above

E. none of the above

**A force is completely defined when we specify________________?**

A. magnitude

B. direction

C. point of application

D. all of the above

E. none of the above