Enginering Mechanics 23ME2006 Quiz I

Forces whose line of action don't lie in the same plane is called

• Non concurrent forces

• Coplanar forces

• Concurrent forces

• Non coplanar forces

According to the principle of transmissibility of forces, the effect of a force upon a body is

• maximum when it acts at the center of gravity of a body

• different at different points in its line of action

• the same at every point in its line of action

• minimum when it acts at the C.G. of the body

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 known as

• Principle of independence of forces

• Principle of resolution of forces

• Principle of transmissibility of forces

• Principle of Coriollis

The forces, which meet at one point and their lines of action also lie on the same plane, are known as

• Non-coplanar non-concurrent forces

• Coplanar non-concurrent forces

• Non-coplanar concurrent forces

• Coplanar concurrent forces

According to Lami’s theorem

• the three forces must be equal

• the three forces must be at 120° to each other

• the three forces must be in equilibrium

• if the three forces acting at a point are in equilibrium, then each force is proportional to the sine of the angle between the other two

The three forces of 100 N, 200 N and 300 N have their lines of action parallel to each other but act in the opposite directions. These forces are known as

• coplanar non-concurrent forces

• coplanar concurrent forces

• like parallel forces

• unlike parallel forces

What do you mean by equilibrium?

• The condition when there is no translational motion

• The condition when there is no translational and rotational motion

• The condition when there is translational and rotational motion

• The condition when there is no rotational motion

If two forces of magnitude 5 N are acting on a point. If the angle between them 60^o, then the magnitude of the resultant force is given by

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For the triangle shown in Fig., the sine law can be written as ______.

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A force F­₁ acting on the particle as shown in Fig. The net vertical force acting on the particle is ________.

• 150 N

• 0 N

• 300 N

• 100 N