WorksheetsAP Physics 1 CH3
Total questions: 20
Worksheet time: 13mins
Name
Class
Date
1.
what is a scalar?
a)
a quantity having only magnitude, not direction.
b)
a quantity having both a magnitude and a direction.
c)
a quantity having a direction but no magnitude.
d)
a thing with some stuff.
2.
_____is an example of a scalar quantity
a)
velocity
b)
force
c)
volume
d)
acceleration
3.
A plane flying 500 MI/hr due north has a tail wind of 45 MI/hr the resultant velocity is:
a)
545 miles/hour due south.
b)
455 miles/hour north.
c)
545 miles/hr due north.
d)
455 MI/hr due south
4.
If a = (3, 2) and b = (-5, 3), what is a + b ?
a)
(2, 5)
b)
(-2, 5)
c)
(8, 5)
d)
(8, -1)
5.
The resultant magnitude of two vectors
a)
Always positive
b)
The same
c)
Always negative
d)
The sum of the two
6.
A particle moves along the x-axis with an acceleration of a = 18t, where a has units of m/s2 . If the particle at time t = 0 is at the origin with a velocity of -12 m/s, what is its position at t = 4.0s?
a)
12m
b)
72m
c)
60m
d)
144m
7.
Consider a ball thrown up from the surface of the earth into the air at an angle of 30° above the horizontal. Air friction is negligible. Just after the ball is released, its acceleration is:
a)
Upwards at 9.8 m/s2
b)
Upwards at 4.9 m/s2
c)
Downwards at 9.8 m/s2
d)
0 m/s2
8.
Two vectors of the same magnitude are added; one pointing east, one west. The magnitude of the resultant vector is
a)
0
b)
1
c)
2
d)
3
9.
The _________ theorem can be used to find the resultant of a right triangle
a)
socratic
b)
archemedes
c)
pythagorean
d)
d. none of the answers
10.
A vector has both magnitude and __________.
a)
mass
b)
time
c)
direction
d)
none of the answers
11.
A boat is rowed directly North across a river at 2.0 m/s. The river flows East at 3.0 m/s. Relative to the shore, the boat has a velocity of _____.
a)
A boat is rowed directly North across a river at 2.0 m/s. The river flows East at 3.0 m/s. Relative to the shore, the boat has a velocity of _____.
b)
3.6 m/s South-West
c)
3.6 m/s North-East
d)
1.0 m/s North-West
12.
You walk 31 m south and then 31 m east. The magnitude and direction of your displacement is ______.
a)
62 m North
b)
44 m south
c)
44 m north-east
d)
44 m south-east
13.
Graphical representation of vectors involves ______.
a)
rawing arrows
b)
units of measure
c)
capacitance
d)
none of the answers
14.
Two vectors or equal magnitude are acting on an object at the same time. Vector A is acting to the west,
while vector B is acting to the south. What is the approximate direction of the resultant of these two
vectors?
while vector B is acting to the south. What is the approximate direction of the resultant of these two
vectors?
a)
Toward the south east.
b)
Toward the north west.
c)
Toward the south west
d)
Toward the north east.
15.
At what angle between two vectors will their resultant have a minimum amount?
a)
90°
b)
180°
c)
0°
d)
45°
16.
A plane is flying through the air at 120 kph toward the north while a wind is blowing toward the east with a
speed of 50 kph. What is the magnitude of the actual velocity of the plane with respect to the ground?
speed of 50 kph. What is the magnitude of the actual velocity of the plane with respect to the ground?
a)
170 kph
b)
85 kph
c)
130 kph
d)
70 kph
17.
At what angle between vectors does the square of the resultant’s magnitude equal the sum of the squares of
the magnitudes of each of the vectors?
the magnitudes of each of the vectors?
a)
90°
b)
180°
c)
0°
d)
45°
18.
As the angle of launch with the horizontal increases for a projected object (i.e. a golf ball being hit), what
happens to the horizontal component of the object’s velocity?
happens to the horizontal component of the object’s velocity?
a)
It increases.
b)
It decreases.
c)
It increases until it is a maximum at a 45° angle, then decreases again.
d)
It is unaffected by the launch angle.
19.
You are standing on the shore of a river and notice that the river is flowing west with a speed of 3.0 m/s.
You also notice that a boat on the river is sailing east at 8.0 m/s with respect to the shore. What is the
boat’s speed through the water?
You also notice that a boat on the river is sailing east at 8.0 m/s with respect to the shore. What is the
boat’s speed through the water?
a)
5.0 m/s
b)
11.0 m/s
c)
5.5 m/s
d)
24.0 m/s
20.
A baseball is hit as a long fly ball to center right field. Compare the acceleration of the ball as it rises
through its arc, to the acceleration of the ball as it falls from the top of the arc to the outfielder’s glove.
through its arc, to the acceleration of the ball as it falls from the top of the arc to the outfielder’s glove.
a)
The acceleration of the ball on the way up is greater than the acceleration coming back down.
b)
The acceleration on the way up is half the acceleration on the way down.
c)
The acceleration on the way up is the same in magnitude but opposite in direction to the acceleration of
the ball on the way down.
the ball on the way down.
d)
The acceleration of the ball throughout its flight is the acceleration due to gravity.
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