Statics Final Exam Review

Statics Final Exam Review

By Katie Heckman

Multiple Choice

What are the x- and y- coordinates of the centroid of the area shown with the given reference point ?

• 2.5 cm, 3.4 cm

• 2.8 cm, 3.3 cm

• 3.2 cm, 4.2 cm

• 3.4 cm, 3.7 cm

Fill in the Blanks

Members of a truss that support no loading and can be determined by visual inspection are called _ _ _. (three words)

Multiple Choice

The cantilever truss supports a vertical force of 600,000 N applied at joint G. What is most nearly the force in member CF in kN?

• 960 kN

• 1200 kN

• 1600 kN

• 2300 kN

Multiple Choice

Which image depicts a negative internal shear force?

Fill in the Blanks

The image depicts a normal force in _. (one word)

Multiple Choice

A 100 kg block rests on an incline. The coefficient of static friction between the block and the ramp is 0.2. The mass of the cable is negligible, and the pulley at point C is frictionless. What is the smallest block B mass that will start the 100 kg block moving up the incline?

• 44 kg

• 65 kg

• 76 kg

• 92 kg

Fill in the Blanks

Two parallel forces with the same magnitude, opposite directions and separated by a perpendicular distance d is the definition of a _. (one word)

Multiple Choice

The weight of a 500 kg homogenous crate is supported by three wall-mounted cables, as shown. If the force in cable AD is 5950 N, most nearly, what is the sum of the x-components in cables BD and CD?

• 4700 N

• 5200 N

• 5900 N

• 6500 N

Multiple Choice

What is most nearly the magnitude of the x-component of the 300 N force at point D on the member shown?

• 120 N

• 130 N

• 180 N

• 240 N

Multiple Choice

A sign has a mass of 150 kg. The sign is attached to the wall by a pin at point B and is supported by a cable between points A and C. Determine the approximate force in the cable.

• 1900 N

• 2500 N

• 3800 N

• 5000 N

Multiple Choice

How many unknowns are at this type of support in 2D?

• 1

• 2

• 3

• 4

Multiple Choice

Which image depicts a positive internal bending moment?

Multiple Choice

Two forces of 20 N and 30 N act at right angles. What is most nearly the magnitude of the resultant force?

• 7 N

• 36 N

• 50 N

• 75 N

Multiple Choice

Most nearly, what are the reactions for F1 and F2 for the truss shown?

• F1 = 1000 N;

  F2 = 4000 N

• F1 = 1300 N;

  F2 = 3800 N

• F1 = 2500 N;

  F2 = 2500 N

• F1 = 3800 N;

  F2 = 1300 N

Multiple Choice

A truss is loaded as shown and support reactions have been determined. Most nearly, what is the force in member CE?

• 1000 N

• 2000 N

• 3000 N

• 4000 N

Multiple Choice

What is most nearly the magnitude of the moment about the x-axis produced by a force of F = 10i - 20j + 30k N acting at the point (2, 1, 1) with coordinates in meters? Use scalar analysis.

• 30 N-m

• 40 N-m

• 50 N-m

• 60 N-m

Multiple Choice

What is most nearly the magnitude of the moment about the x-axis produced by a force of F = 10i -20j+ 40k N acting at the point (2, 1, 1) with coordinates in meters? Use mixed triple product.

• 30 N-m

• 40 N-m

• 50 N-m

• 60 N-m

Multiple Choice

What are the approximate x- and y- coordinates of the centroid of the area shown?

• 3.4 cm; 5.6 cm

• 3.5 cm; 5.5 cm

• 3.9 cm, 4.4 cm

• 3.9, 4.8 cm