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1 | |
The fundamental unit for length is the mile. |
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| | A) | True |
| | B) | False |
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2 | |
The kilogram is equivalent to a mass of 1000 g. |
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| | A) | True |
| | B) | False |
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3 | |
Only vectors having the same dimensions may be added. |
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| | A) | True |
| | B) | False |
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4 | |
The difference between two vectors is obtained by adding one vector to the negative of the other. |
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| | A) | True |
| | B) | False |
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5 | |
The order in which two or more vectors are added does not affect their resultant. |
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| | A) | True |
| | B) | False |
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6 | |
Given the x component of one vector and the y component of another vector, it is possible to find the resultant of the two vectors mathematically. |
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| | A) | True |
| | B) | False |
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7 | |
The graphical methods of vector addition are not as accurate as the mathematical method. |
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| | A) | True |
| | B) | False |
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8 | |
Vector addition can be performed only for concurrent vectors. |
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| | A) | True |
| | B) | False |
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9 | |
If a boat travels upstream with a speed of 8 km/h in a current whose speed is 3 km/h, the boat's speed relative to the shore is 5 km/h. |
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| | A) | True |
| | B) | False |
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10 | |
The x component of the resultant vector is equal to the sum of the x components of the individual vectors. |
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| | A) | True |
| | B) | False |
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11 | |
Which of the following is not a fundamental quantity? |
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| | A) | Length |
| | B) | Force |
| | C) | Mass |
| | D) | Time |
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12 | |
The resultant of 10 and 15 lb acting in opposite directions on an object is |
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| | A) | 150 lb |
| | B) | 25 lb |
| | C) | 5 lb |
| | D) | 20 lb |
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13 | |
Which is a scalar quantity? |
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| | A) | Velocity |
| | B) | Force |
| | C) | Speed |
| | D) | Displacement |
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14 | |
A force of 3 N acts perpendicularly to a force of 4 N. Their resultant has a magnitude of |
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| | A) | 12 N |
| | B) | 7 N |
| | C) | 5 N |
| | D) | 1 N |
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15 | |
Which is a vector quantity? |
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| | A) | Volume |
| | B) | Time |
| | C) | Distance |
| | D) | Displacement |
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16 | |
Given that the units of s, v, a, and t are feet, feet per second, feet per second squared, and seconds, respectively, which of the following equations is dimensionally incorrect? |
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| | A) | s = vt + ½at |
| | B) | 2as = vf 2 - v0 2 |
| | C) | v = v0 + at |
| | D) | s = vt |
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17 | |
A force of 16 N is directed 30o north of east. The y component of the force is |
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| | A) | 8 N |
| | B) | 13.8 N |
| | C) | 12 N |
| | D) | 4.8 N |
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18 | |
A man walks 9 km east and then 12 km north. The magnitude of his resultant displacement is |
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| | A) | 21 km |
| | B) | 15 km |
| | C) | 13 km |
| | D) | 3 km |
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19 | |
The resultant of the forces in Fig. 3-2 is
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| | A) | 66.5 N, 222o |
| | B) | 66.5 N, 132o |
| | C) | 66.5 N, 228o |
| | D) | none of these |
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20 | |
A 20-lb force acts to the left while an 80-lb force acts upward and to the right at an angle of 37o. The magnitude of the resultant force is |
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| | A) | 80 lb |
| | B) | 70 lb |
| | C) | 65 lb |
| | D) | 100 lb |
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21 | |
If two quantities are to be added or subtracted, they must be of the same . |
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22 | |
Three examples of vector quantities are , , and . |
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23 | |
A physical quantity that is specified completely by a number and a unit is called a(n) . |
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24 | |
Every vector can be resolved into two perpendicular vectors called its . |
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25 | |
A physical quantity that is specified completely by a number, a unit, and a direction is called a(n) . |
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26 | |
In the method of vector addition, the tail of one vector is connected to the tip of another until all vectors have been represented. |
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27 | |
The is a single force whose effect is the same as that of a given set of concurrent forces. |
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28 | |
In the component method, the x component of the resultant vector is equal to the sum of the of each vector. |
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29 | |
Forces that intersect at a common point or have the same point of application are said to be . |
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30 | |
The difference between two vectors is obtained by adding one vector to the of the other. |
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