QUESTION 7 *,=x,+v+ 2 x,= 66.6 m "f V= 5.09 m/s t= 9.02 s a = 1.13 m/s2 x,= ? in m Input answer using 3 significant figures.

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Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
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QUESTION 7
X=x,+v t+-a t2
XI
*= 66.6 m
= 5.09 m/s
XI
t= 9.02 s
a =
1.13 m/s2
x= ? in m
Input answer using 3 significant figures.
QUESTION 8
v2 = vo² + 2a(x-xo)
vo = 62.8 m/s
a = 14.0 m/s?
x = 57.6 m
x0 = 20.3 m
v = ? in m/s.
Input your answer in m/s using 3 significant figures.
Transcribed Image Text:QUESTION 7 X=x,+v t+-a t2 XI *= 66.6 m = 5.09 m/s XI t= 9.02 s a = 1.13 m/s2 x= ? in m Input answer using 3 significant figures. QUESTION 8 v2 = vo² + 2a(x-xo) vo = 62.8 m/s a = 14.0 m/s? x = 57.6 m x0 = 20.3 m v = ? in m/s. Input your answer in m/s using 3 significant figures.
QUESTION 9
An object is moving in a straight line.
For this object, the time of movement with velocity Vz is ti, and the time of movement with velocity V2 is t.
Find the average velocity.
O ( Vz + V2) / 2
O (t: V: + t V2) / (t + t2)
O ( V: / t: + V2 / t:) / (1 / t: + 1/ tL)
O (t: + t) / ( V: / ti + V2 / t.)
QUESTION 10
The initial position of some object is described by coordinates Xo = 5m and Yo = 6m.
The next position is described by coordinates X: = 9m and Y: = 6m.
The third final position is described by coordinates X: = 9m and Y: = 9m.
The object moves between positions by straight lines.
It takes time t= 14s to move from the initial position to the final position.
Calculate the average speed for motion from the initial to the final position. Input numerical answer in m/s units.
QUESTION 11
An arrow is shot from a height of 9.3 m toward a cliff of height H. It is shot with a velocity of 61.2 m/s at an angle of 71° above the horizontal.
It lands on the top edge of the cliff 5.7 s later.
What is the height of the cliff?
Input your answer in meters using 3 significant figures. (g = -9.80 m/s*)
Transcribed Image Text:QUESTION 9 An object is moving in a straight line. For this object, the time of movement with velocity Vz is ti, and the time of movement with velocity V2 is t. Find the average velocity. O ( Vz + V2) / 2 O (t: V: + t V2) / (t + t2) O ( V: / t: + V2 / t:) / (1 / t: + 1/ tL) O (t: + t) / ( V: / ti + V2 / t.) QUESTION 10 The initial position of some object is described by coordinates Xo = 5m and Yo = 6m. The next position is described by coordinates X: = 9m and Y: = 6m. The third final position is described by coordinates X: = 9m and Y: = 9m. The object moves between positions by straight lines. It takes time t= 14s to move from the initial position to the final position. Calculate the average speed for motion from the initial to the final position. Input numerical answer in m/s units. QUESTION 11 An arrow is shot from a height of 9.3 m toward a cliff of height H. It is shot with a velocity of 61.2 m/s at an angle of 71° above the horizontal. It lands on the top edge of the cliff 5.7 s later. What is the height of the cliff? Input your answer in meters using 3 significant figures. (g = -9.80 m/s*)
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