Introduction to Statics: Master the Fundamentals of Equilibrium and Forces

Question 1

The SI unit for force is:

Accepted Answer

Newton

Answer

Joule

Answer

Pascal

Answer

Kelvin

Question 2

A particle is in equilibrium if the sum of the forces acting on it is:

Accepted Answer

Zero

Answer

Greater than zero

Answer

Less than zero

Answer

Non-zero

Question 3

The SI unit for moment is:

Accepted Answer

Newton-meter

Answer

Pascal

Answer

Kelvin

Answer

Joule

Question 4

The moment of a force about a point is defined as the:

Accepted Answer

Force multiplied by the distance from the point to the line of action of the force

Answer

Force divided by the distance from the point to the line of action of the force

Answer

Distance from the point to the line of action of the force multiplied by the force

Answer

Distance from the point to the line of action of the force divided by the force

Question 5

For a rigid body in equilibrium, both the net force and the net moment about any point must be:

Accepted Answer

Zero

Answer

The force in the x-direction

Answer

The force in the y-direction

Answer

The sum of all forces acting on the particle

Question 6

The centre of gravity of a uniform rod of length L is located at:

Accepted Answer

L/2

Answer

L/3

Answer

L/4

Answer

L

Question 7

Which physical quantity is a vector?

Accepted Answer

Velocity

Answer

Mass

Answer

Temperature

Answer

Density

Question 8

A free body diagram is a representation that:

Accepted Answer

Shows all the forces acting on a particle or body

Answer

Is always drawn to scale

Answer

Must include the weight of the particle or body

Answer

Must be drawn in the same direction as the resultant force

Question 9

The weight of an object is:

Accepted Answer

Equal to the force of gravity acting on it

Answer

Equal to its mass

Answer

Proportional to its mass

Answer

Equal to its volume

Question 10

A truss is a structure primarily designed to:

Accepted Answer

Transfer loads to supports

Answer

Be statically indeterminate

Answer

Be constructed using steel

Answer

Have triangular elements

Question 11

An object is moving down a frictionless inclined plane. Which of the following diagrams accurately depicts the free body diagram of this object?

Accepted Answer

Weight pointing downwards, normal force pointing perpendicular to the plane; force of gravity pointing downwards

Answer

Normal force and weight pointing upwards; force of gravity pointing downwards

Answer

Weight and normal force pointing downwards; force of gravity pointing upwards

Answer

Weight pointing downwards, normal force pointing upwards; force of gravity pointing downwards

Question 12

A 10 kg block is suspended by a rope. What is the tension in the rope?

Accepted Answer

98 N

Answer

196 N

Answer

0 N

Answer

49 N

Question 13

A simply supported beam has a point load of 1000 N at its center. What is the reaction force at each support?

Accepted Answer

500 N

Answer

1000 N

Answer

0 N

Answer

250 N

Question 14

A force of 100 N acts on an object at an angle of 30 degrees to the horizontal. What is the horizontal component of this force?

Accepted Answer

86.6 N

Answer

173.2 N

Answer

100 N

Answer

50 N

Question 15

Which of the following is NOT a fundamental principle of statics?

Accepted Answer

Conservation of Energy

Answer

Equilibrium of Moments

Answer

Free Body Diagram

Answer

Equilibrium of Forces

Question 16

A particle is in equilibrium when:

Accepted Answer

The net force acting on it is zero.

Answer

It is at rest.

Answer

It is moving with constant velocity.

Answer

It is moving with constant acceleration.

Question 17

A 10 kg mass is hanging from a cable. What is the tension in the cable?

Accepted Answer

98.1 N

Answer

100 N

Answer

10 N

Answer

1000 N

Question 18

A beam is supported at its ends by two rollers. Which type of support reaction is present at each roller?

Accepted Answer

Normal force

Answer

Moment

Answer

Shear force

Answer

Friction force

Question 19

A free body diagram (FBD) is used to:

Accepted Answer

Represent all forces acting on a body.

Answer

Analyze the motion of a body.

Answer

Calculate the acceleration of a body.

Answer

Determine the velocity of a body.

Question 20

A 20 kg box is placed on a horizontal surface with a coefficient of static friction of 0.4. What is the maximum force that can be applied horizontally before the box starts to move?

Accepted Answer

78.4 N

Answer

20 N

Answer

80 N

Question 21

A 5 m long beam is simply supported at its ends. A concentrated load of 10 kN is applied at the midpoint of the beam. What is the reaction force at each support?

Accepted Answer

5 kN

Answer

2.5 kN

Answer

10 kN

Answer

20 kN

Question 22

Which of the following is a scalar quantity?

Accepted Answer

Volume

Answer

Displacement

Answer

Acceleration

Answer

Velocity

Question 23

The moment of a force about a point is defined as:

Accepted Answer

The product of the force and the perpendicular distance from the point to the line of action of the force.

Answer

The product of the force and the distance from the point to the line of action of the force.