Online Quiz On Mechanics
25 Questions
| Total Attempts: 288
.
Questions and Answers
- 1.
Determine the magnitude of the resultant force acting on the screw eye- A.
5.798 kN
- B.
7.798 kN
- C.
6.798 kN
- D.
4.798 kN
- 2.
What is the direction measured clockwise from the x-axis?
- A.
106º
- B.
103º
- C.
104º
- D.
105º
- 3.
A trolley that moves along a horizontal beam is acted upon by two forces as shown. Knowing that a = 25º, determine the magnitude of the force P so that the resultant force exerted on the trolley is vertical.
- A.
5660 N
- B.
6660 N
- C.
4660 N
- D.
3660 N
- 4.
What is the corresponding magnitude of the resultant?
- A.
3730 N
- B.
3830 N
- C.
3930 N
- D.
3630 N
- 5.
The stock mounted on the lathe is subjected to a force of 60 N. Determine the coordinate direction angle β
- A.
50º
- B.
60º
- C.
40º
- D.
30º
- 6.
Express the 60 N force as a Cartesian vector.
- A.
F = {30i−30j​+42.4k} N
- B.
F = {20i−30j​+42.4k} N
- C.
F = {30i−20j​+42.4k} N
- D.
F = {-30i+30j​+42.4k} N
- 7.
A square foundation mat supports the four columns shown. Determine the magnitude of the resultant of the four loads.
- A.
-80i
- B.
-80k
- C.
-80j
- D.
-70j
- 8.
Calculate the magnitude of the moment about the base point O of the 600-N force.
- A.
2509.851 N.m
- B.
2409.851 N.m
- C.
2069.851 N.m
- D.
2609.851 N.m
- 9.
Determine the magnitude of the resultant force at A
- A.
1.18 kN
- B.
1.28 kN
- C.
2.18 kN
- D.
2.28 kN
- 10.
The guy wires are used to support the telephone pole. Represent the 250 N force in Cartesian vector form.
- A.
43.519i + 174.064j - 174.064k
- B.
-43.519i + 174.064j – 174.064k
- C.
-43.519i - 174.064j + 174.064k
- D.
43.519i - 174.064j + 174.064k
- 11.
Represent the 175 N force in in Cartesian vector form
- A.
-53.22i - 79.836j - 146.366k
- B.
53.22i + 79.836j - 146.366k
- C.
53.22i - 79.836j - 146.366k
- D.
-53.22i - 79.836j - 146.366k
- 12.
The crate has a weight of 550 lb. Determine the tension in cable AB
- A.
489 Ib
- B.
487 Ib
- C.
498 Ib
- D.
478 Ib
- 13.
What is the tension in cable AC
- A.
518 Ib
- B.
581 Ib
- C.
418 Ib
- D.
481 Ib
- 14.
The screw eye is subjected to two forces, F1 and F2. Determine the magnitude of the resultant force.
- A.
231 N
- B.
213 N
- C.
313 N
- D.
321 N
- 15.
What is the direction of the resultant force?
- A.
55.8º
- B.
56.8º
- C.
54.8º
- D.
45.8º
- 16.
What is the sum of the moment at point A?
- A.
253 Ib-ft
- B.
255 Ib-ft
- C.
235 Ib-ft
- D.
0
- 17.
What is the sum of the moment at point B?
- A.
253 Ib-ft
- B.
255 Ib-ft
- C.
235 Ib-ft
- D.
0
- 18.
Three forces act on the car. The sum of the forces is zero and the sum of the moments of the forces about point P is zero. Determine the forces A and B.
- A.
A=933 lb, B=1867 lb
- B.
A=1867 lb, B=933 lb
- C.
A=1687 lb, B=933 lb
- D.
A=1867 lb, B=339 lb
- 19.
What is the sum of the moment about Q?
- A.
1245 Ib-ft
- B.
0
- C.
1425 Ib-ft
- D.
None of the above
- 20.
Three loads are applied to a beam as shown. The beam is supported by a roller at A and by a pin at B. Neglecting the weight of the beam, determine the reaction at A when P=15 kips.
- A.
6.00 kips
- B.
4.00 kips
- C.
7.00 kips
- D.
5.00 kips
- 21.
What is the magnitude of the x component of the reactions at B?
- A.
6.00 kips
- B.
0
- C.
4.00 kips
- D.
5.00 kips
- 22.
Determine the vertical component of the reaction on the beam caused by the rocker at A.
- A.
931 N
- B.
913 N
- C.
391 N
- D.
319 N
- 23.
Determine the vertical component of the reaction on the beam caused by the pin at B.
- A.
405 N
- B.
505 N
- C.
540 N
- D.
450 N
- 24.
What is the reaction of the rocker B on the beam?
- A.
4.46 kN
- B.
3.46 kN
- C.
5.46 kN
- D.
6.46 kN
- 25.
Determine the horizontal component of reaction at the pin A
- A.
1.83 kN
- B.
2.73 kN
- C.
1.73 kN
- D.
3.73 kN
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