Force Vectors - General Questions (2)

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Force Vectors - General Questions

pg2-27 (1)

Two forces act on a block. Determine the angle thetaa between them.

A.	= 135.0°
B.	= 65.1°
C.	= 45.0°
D.	= 114.9°

Answer: Option D

Explanation:

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10.

pg2-24

Determine the angle thetaa between the pole AC and the wire AB.

A.	= 131.8°
B.	= 70.5°
C.	= 109.5°
D.	= 48.2°
E.

Answer: Option B

Explanation:

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11.

pg2-6

If thetaa = 20° and phii = 35°, determine the magnitudes of F₁ and F₂ so that the resultant force has a magnitude of 20 lb and is directed along the positive x axis.

A.	F1 = 20.0 lb, F2 = 22.9 lb
B.	F1 = 25.6 lb, F2 = 26.6 lb
C.	F1 = 28.5 lb, F2 = 11.91 lb
D.	F1 = 14.00 lb, F2 = 8.35 lb

Answer: Option D

Explanation:

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12.

pg2-7

The gusset plate G of a bridge joint is subjected to the two member forces at A and B. If the force at B is horizontal and the force at A is directed at thetaa = 30°, determine the magnitude and direction of the resultant force.

A.	R = 458 N, = 97.5° CCW
B.	R = 252 N, = 82.5° CCW
C.	R = 252 N, = 97.5° CCW
D.	R = 458 N, = 82.5° CCW

Answer: Option C

Explanation:

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13.

pg2-10

Determine the magnitude and direction of the resultant force.

A.	R = 251 N, = 85.5° CCW
B.	R = 251 N, = 94.5° CCW
C.	R = 421 N, = 67.7° CCW
D.	R = 421 N, = 112.3° CCW

Answer: Option A

Explanation:

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14.

pg2-3

Determine the magnitude of the x and y components of the 700-lb force.

A.	Fx = -350 lb, Fy = 606 lb
B.	Fx = -404 lb, Fy = 571 lb
C.	Fx = -606 lb, Fy = 350 lb
D.	Fx = -571 lb, Fy = 404 lb

Answer: Option C

Explanation:

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15.

pg2-19

Determine the magnitude and direction of the position vector r which points from point A to point B.

A.	r = 12 ft, = 70.5°, = 48.2°, = 131.8°
B.	r = 12 ft, = 109.5°, = 131.8°, = 48.2°
C.	r = 12 ft, = 70.5°, = 48.2°, = 48.2°
D.	r = 12 ft, = 109.5°, = 131.8°, = 131.8°

Answer: Option A

Explanation:

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16.

pg2-27

What is the projection of the force F₂ along the positive axis?

A.	F2y = 170.0 N
B.	F2y = —80.0 N
C.	F2y = 90.0 N
D.	F2y = 120.0 N

Answer: Option C

Explanation:

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Force Vectors - General Questions (2)

Force Vectors - General Questions

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