611. The unit of work or energy in S.I. units is
A.Newton
B.Joule
C.Kilogram metre
D.Watt

612. Forces are called concurrent when their lines of action meet in
A.One point
B.Two points
C.Plane
D.Perpendicular planes

613. Forces are called coplaner when all of them acting on body lie in
A.One point
B.One plane
C.Different planes
D.Perpendicular planes

614. A force acting on a body may
A.Introduce internal stresses
B.Retard its motion
C.Change its motion
D.All of the above

615. Effect of a force on a body depends upon
A.Magnitude
B.Direction
C.Position or line of action
D.All of the above

616. If a number of forces act simultaneously on a particle, it is possible
A.Not a replace them by a single force
B.To replace them by a single force
C.To replace them by a single force through C.G.
D.To replace them by a couple

617. A force is completely defined when we specify
A.Magnitude
B.Direction
C.Point of application
D.All of the above

618. If two equal forces of magnitude P act at an angle ? degree, their resultant will be
A.P/2 cos ?/2
B.2P sin ?/2
C.2P tan ?/2
D.2P cos ?/2

619. The resolved part of the resultant of two forces inclined at an angle ? in a given direction is equal to
A.The algebraic sum of the resolved parts of the forces in the given direction
B.The sum of the resolved parts of the forces in the given direction
C.The difference of the forces multiplied by the cosine of ?
D.The sum of the forces multiplied by the sine of ?

620. Which of the following is not the unit of distance ?
A.Angstrom
B.Milestone
C.Micron
D.Millimetre

NOTE
IF YOU THINK ANY OF THE MCQ ABOVE IS WRONG.
PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX.
THANK YOU