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1 | |
An object in motion can have a constant velocity only if it moves in a straight path. |
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| | A) | True |
| | B) | False |
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2 | |
An object falling freely from rest near the surface of the earth falls a distance of 32 ft by the end of the first second. |
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| | A) | True |
| | B) | False |
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3 | |
In a vacuum, all bodies fall with the same velocity. |
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| | A) | True |
| | B) | False |
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4 | |
If an object's velocity is decreasing constantly, it will always have a negative acceleration. |
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| | A) | True |
| | B) | False |
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5 | |
An object thrown downward in a gravitational field has the same acceleration as one dropped from rest. |
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| | A) | True |
| | B) | False |
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6 | |
If an object has an acceleration of 8 m/s2, its distance will increase by 8 m every second. |
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| | A) | True |
| | B) | False |
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7 | |
For a ball thrown vertically upward, its upward motion with respect to position and velocity is just the reverse of its downward motion. |
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| | A) | True |
| | B) | False |
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8 | |
The velocity and position of a free-falling body after 2 s are numerically the same. |
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| | A) | True |
| | B) | False |
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9 | |
In the absence of friction, all bodies, large or small, heavy or light, fall to the earth with the same acceleration. |
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| | A) | True |
| | B) | False |
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10 | |
If any two of the parameters v0, vf, a, s, and t are given, the other three can be calculated from derived equations. |
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| | A) | True |
| | B) | False |
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11 | |
The motion of a projectile fired at an angle is an example of uniformly accelerated motion. |
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| | A) | True |
| | B) | False |
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12 | |
The resultant force acting on a projectile is its weight. |
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| | A) | True |
| | B) | False |
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13 | |
A projectile fired horizontally will strike the ground in the same time as one dropped vertically from the same position if we neglect the effect of air resistance. |
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| | A) | True |
| | B) | False |
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14 | |
A projectile launched into space at any angle will have a constant horizontal velocity. |
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| | A) | True |
| | B) | False |
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15 | |
The horizontal range is greatest when the angle of projection is 45o. |
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| | A) | True |
| | B) | False |
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16 | |
The vertical motion of a projectile is uniformly accelerated motion. |
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| | A) | True |
| | B) | False |
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17 | |
The range of a projectile depends only on its initial speed. |
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| | A) | True |
| | B) | False |
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18 | |
A horizontally fired projectile will drop 32 ft during the first second. |
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| | A) | True |
| | B) | False |
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19 | |
If an apple drops from a tree at the same instant a projectile is fired toward it from the ground, they will still collide in the air. |
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| | A) | True |
| | B) | False |
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20 | |
When a projectile is fired at a 45o angle, its maximum height will equal its range. |
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| | A) | True |
| | B) | False |
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21 | |
An object falls freely from rest. Its position after 2 s is how far below the point of release? |
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| | A) | 32 ft |
| | B) | 64 ft |
| | C) | 96 ft |
| | D) | 48 ft |
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22 | |
If the initial velocity, the distance traveled, and the time elapsed are known, which equation would you use to calculate the acceleration? |
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| | A) | s = vt |
| | B) | s = v0t + ½at ² |
| | C) | vf = v0 + at |
| | D) | 2as = vf + v0 |
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23 | |
The algebraic sign of acceleration depends on |
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| | A) | the direction on the force of the accelerated object |
| | B) | whether an object is speeding up or slowing down |
| | C) | the sign of the final velocity |
| | D) | the position of the object |
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24 | |
An object traveling initially at 24 ft/s slows to 12 ft/s in 3 s. Its acceleration is |
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| | A) | 4 ft/s2 |
| | B) | -4 ft/s |
| | C) | -4 ft/s2 |
| | D) | -8 ft/s2 |
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25 | |
The distance traveled by the object in Question 24 is |
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| | A) | 48 ft |
| | B) | 66 ft |
| | C) | 98 ft |
| | D) | 54 ft |
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26 | |
An object is thrown downward with an initial velocity of 32 ft/s. Its velocity after 3 s is |
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| | A) | 102 ft/s |
| | B) | 96 ft/s |
| | C) | 80 ft/s |
| | D) | 128 ft/s |
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27 | |
A car accelerates from rest at 4 m/s2. How far will it travel in 4 s? |
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| | A) | 32 m |
| | B) | 19.6 m |
| | C) | 78.4 m |
| | D) | 94.5 m |
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28 | |
An arrow is shot vertically upward with an initial velocity of 96 ft/s. It will first
come to a stop in |
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| | A) | 4 s |
| | B) | 2 s |
| | C) | 3 s |
| | D) | 6 s |
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29 | |
An object is projected upward with an initial velocity of 64 ft/s. What will be its position above the point of release after 3 s? |
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| | A) | 48 ft |
| | B) | 16 ft |
| | C) | 32 ft |
| | D) | 64 ft |
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30 | |
A car accelerates for 10 s at 6 m/s2. What is its final velocity if its initial velocity was 4 m/s? |
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| | A) | 60 m/s |
| | B) | 64 m/s |
| | C) | 34 m/s |
| | D) | 30 m/s |
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31 | |
The acceleration of a projectile is |
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| | A) | g |
| | B) | -g |
| | C) | 0 |
| | D) | dependent on its initial velocity |
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32 | |
A projectile is fired horizontally with an initial velocity of 20 m/s. Its horizontal velocity 3 s later is |
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| | A) | 20 m/s |
| | B) | 60 m/s |
| | C) | 6.67 m/s |
| | D) | 29.4 m/s |
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33 | |
The vertical velocity of the projectile in Question 32 after 3 s is approximately |
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| | A) | 60 m/s |
| | B) | 9.8 m/s |
| | C) | 29.4 m/s |
| | D) | 20 m/s |
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34 | |
A cannonball is projected horizontally with a velocity of 1200 ft/s from the top of a cliff 128 ft high. It will strike the water below in approximately |
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| | A) | 8 s |
| | B) | 2.83 s |
| | C) | 0.1 s |
| | D) | 9.38 s |
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35 | |
In Question 34, the horizontal range is approximately |
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| | A) | 3396 ft |
| | B) | 1200 ft |
| | C) | 938 ft |
| | D) | 9600 ft |
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36 | |
A projectile is fired at an angle of 30° with an initial velocity of 640 ft/s. The time to reach its maximum height is approximately |
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| | A) | 17.3 s |
| | B) | 20 s |
| | C) | 5 s |
| | D) | 10 s |
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37 | |
In Question 36, the horizontal range is |
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| | A) | 5542 ft |
| | B) | 11,084 ft |
| | C) | 3200 ft |
| | D) | 6400 ft |
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38 | |
A projectile is fired at an angle of 37° with an initial velocity of 100 m/s. What is the approximate vertical component of its velocity after 2 s? |
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| | A) | 60 m/s |
| | B) | 40 m/s |
| | C) | 80 m/s |
| | D) | 100 m/s |
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39 | |
In Question 38, the position above the ground after 3 s is approximately |
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| | A) | 200 m |
| | B) | 140 m |
| | C) | 136 m |
| | D) | 120 m |
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40 | |
Which of the following projection angles will result in the greatest range? |
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| | A) | 20° |
| | B) | 37° |
| | C) | 48° |
| | D) | 60° |
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41 | |
The total distance traveled divided by the time elapsed is a measure of . |
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42 | |
is motion in a straight line in which the speed changes at a constant rate. |
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43 | |
At least of the following parameters must be known to
find the other two: , , , , and . |
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44 | |
The final velocity is equal to the initial velocity plus . |
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45 | |
In the absence of friction, all objects fall to the earth with the same , independent of size or weight. |
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46 | |
A body that has a continually increasing negative velocity has a(n) acceleration. |
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47 | |
The acceleration due to gravity near the earth is 32 or m/s2. |
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48 | |
If the upward direction is chosen as positive, a negative distance s indicates that
the final position is . |
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49 | |
The distances traveled by an object dropped from rest after 1, 2, and 3 s are ft, ft, and ft, respectively. |
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50 | |
An acceleration of 4 ft/s2 means that every the velocity increases by . |
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51 | |
A projectile is an object launched into space under the influence of only. |
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52 | |
In working with trajectories, it is easier to treat the and the motions separately. |
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53 | |
Projectiles fired upward, downward, or at an angle all have the same . |
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54 | |
The only force acting on a projectile is its . |
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55 | |
The maximum height of a projectile may be found by dividing the component of the initial by the . |
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56 | |
For projectile motion, the component of the is constant. |
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