20 Questions
| Attempts: 605

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Questions and Answers

- 1.Forces are called concurrent when their lines of action meet in:
- A.
One point

- B.
Two points

- C.
Plane

- D.
Perpendicular planes

- 2.A force acting on a body may:
- A.
introduce internal stresses

- B.
Balance the other forces acting on it

- C.
Retard its motion

- D.
All the above

- 3.Effect of a force on a body depends upon:
- A.
Magnitude

- B.
Direction

- C.
Position or line of action

- D.
All of the above

- 4.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

- 5.The unit of work or energy in S.I. units.
- A.
Newton

- B.
pascal

- C.
Kilogram meter

- D.
Joule.

- 6.A force is completely defined when we specify:
- A.
Magnitude

- B.
direction

- C.
Point of application

- D.
all of the above

- 7.Which is the correct statement about the law of polygon of forces?
- A.
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 in equilibrium

- B.
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

- C.
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

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

- 8.Forces are called coplanar when all of them acting on body lie in:
- A.
perpendicular planes

- B.
One plane

- C.
One point

- D.
Similar planes

- 9.The unit of force in S.I. units is:
- A.
kilogram

- B.
Newton

- C.
Watt

- D.
Dyne

- 10.Lami's theorem is applicable for:
- A.
3 forces in any plane

- B.
3 forces at different plane

- C.
3 forces which are coplanar

- D.
3 forces which are concurrent and coplanar

- 11.The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is as per the principle of:
- A.
Resolution of forces

- B.
Balance of force

- C.
Dependence of forces

- D.
Independence of forces

- 12.According to law of triangle of forces:
- A.
If three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium

- B.
Three forces acting at a point can be represented by a triangle, each side being proportional to force

- C.
If three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two

- D.
three forces acting at a point will be in equilibrium

- 13.If two forces of magnitude P and 2P act at an angle 60°, their resultant will be:
- A.
2.65P

- B.
3P

- C.
2.59P

- D.
2.44P

- 14.Which of the following is not a scalar quantity?
- A.
Acceleration

- B.
Density

- C.
Time

- D.
Mass

- 15.The weight of a body is due to:
- A.
Gravitational force of attraction towards the center of the earth

- B.
Force of attraction experienced by particles

- C.
Gravitational pull exerted by the earth

- D.
Forces experienced by body in atmosphere

- 16.The figure shows a particular position of 200 mm connecting rod AB and 80 mm long crank BC. At this position, the connecting rod of the engine experience a force of 3000 N on the crank pin at B. Find its horizontal component.
- A.
2814.2 N

- B.
1039.2 N

- C.
507.1 N

- D.
568 N

- 17.The figure shows a particular position of 200 mm connecting rod AB and 80 mm long crank BC. At this position, the connecting rod of the engine experience a force of 3000 N on the crank pin at B. Find its vertical component.
- A.
2814.2 N

- B.
1039.2 N

- C.
507.1 N

- D.
568 N

- 18.Determine the tension in cables AB necessary to support the 60-kg cylinder in Figure.
- A.
420 N

- B.
450 N

- C.
457.6 N

- D.
475.6 N

- 19.Determine the tension in cables BC necessary to support the 60-kg cylinder in Figure.
- A.
420 N

- B.
450 N

- C.
476

- D.
457 N

- 20.Determine the magnitude of the component force F in the given figure.
- A.
245 lb

- B.
273 lb

- C.
500 lb

- D.
Can't determined

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