WorksheetsModelación del movimiento
Total questions: 12
Worksheet time: 15mins
Name
Class
Date
1.
a)
-23i+7j-k
b)
23i+7j-k
c)
-2i+j-7k
d)
-3i+7j-k
2.
a)
11𝑖-13𝑗+3𝑘
b)
-11𝑖+13𝑗−3𝑘
c)
1𝑖+13𝑗−3𝑘
d)
11𝑖+13𝑗−3𝑘
3.
Find the angle between v and w
a)
21.8 degrees
b)
111.8 degrees
c)
68.2 degrees
4.
If the dot product of two vectors are equal to zero, then what do we know about the two vectors?
a)
They are parallel.
b)
They are perpendicular.
c)
They are neither.
5.
What is the horizontal acceleration of a projectile?
a)
0 m/s2
b)
9.8 m/s2
6.
Two objects of the same mass are launched from the ground. Object A has a launch angle of 45, while Object B has a launch angle of 65. Which object will hit the ground first?
a)
A
b)
B
c)
Both objects hit the ground at the same time
d)
unable to determine with the given information
7.
A projectile is fired with initial velocity vo at an angle θ0 with the horizontal and follows the trajectory shown above. Which of the following pairs of graphs best represents the vertical components of the velocity and acceleration, v and a, respectively, of the projectile as functions of time t?
a)
b)
c)
d)
e)
8.
If you throw a baseball straight up, what is its acceleration at the highest point?
a)
9.8 m/s2
b)
9.8 m/s
c)
0 m/s2
d)
0 m/s
9.
The velocity is always _____ to the line of a circle.
a)
outwards
b)
towards the center
c)
tangent
d)
faster
10.
Centripetal acceleration always points
a)
in the direction of the object's motion
b)
in the opposite direction of the object's motion
c)
towards the center of the circle
d)
towards the outside of the circle
11.
Which graph represents zero acceleration (constant velocity)?
a)
A
b)
B
c)
C
d)
D
12.
If the cross product of two vectors are equal to zero, then what do we know about the two vectors?
a)
They are parallel.
b)
They are perpendicular.
c)
They are neither.
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