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Quiz 2--PHYS 101--3T--Fall 2013
Multiple Choice
Identify the choice that best completes the statement or answers the question.
1. A vector of magnitude 3 CANNOT be added to a
vector of magnitude 4 so that the magnitude of the
resultant is:
a.
b.
c.
d.
e.
4. The following are 2 vectors. Which figure best
represents the sum B-A=C?
7
zero
3
5
1
2. A vector in the xy plane has a magnitude of 25m
and an x component of 12m. The angle it makes
with the positive x axis is
a.
a.
b.
c.
d.
e.
26º
64º
61º
29º
241º
b.
3. Identical guns fire identical bullets horizontally at
the same speed from the same height, one on the
Earth and one on the Moon. Which of the
following three statements is/are true?
c.
I. The horizontal distance traveled by the bullet is
greater for the Moon.
II. The flight time is less for the bullet on the Earth.
III. The velocity of the bullets at impact are the
same.
a.
b.
c.
d.
e.
d.
I, II, & III
I & II only
I & III only
II & III only
III only
1
5. The airplane shown is in level flight at an altitude of 0.50 km and a speed of 42.0 m/s. At
what distance D should it release a heavy bomb to hit the target X? Take g=10m/s 2 and neglect air resistance.
a.
b.
c.
290 m
2600 m
15,000 m
d.
e.
420 m
150 m
6. A stone is thrown horizontally and follows the path
XYZ shown. The direction of the acceleration of the stone at point Y is shown by which of
the vectors A-E?
7. If we know an object is moving at constant
velocity, we may assume:
a. there are no forces acting on the object.
b. the net force acting on the object is zero.
c. the object is accelerating.
d. the object is losing mass.
8. A 7.0-kg bowling ball experiences a net force of
5.0 N. What will be its acceleration?
a.
b.
c.
d.
e.
a.
b.
c.
d.
A
B
C
D
E
2
0.71 m/s2
35 m/s2
5.0 m/s2
7.0 m/s2
12. Two forces act on a 6.00-kg object. One of the
forces is 10.0 N. If the object accelerates at 2.00
m/s2, what is the greatest possible magnitude of the
other force?
9. Two ropes are attached to a 40-kg object. The first
rope applies a force of 25 N and the second, 40 N.
If the two ropes pull in opposite directions, what is
the magnitude of the resultant acceleration of the
object?
a.
b.
c.
d.
a.
b.
c.
d.
0.38 m/s2
47 m/s2
1.2 m/s2
1.6 m/s2
13. The inertia of a body tends to cause the body to:
10. What can you say about the force of gravity (F g)
acting on a feather or a stone?
a. Fg is greater for the stone
b. Fg is greater for the feather
c. Fg is zero for both
d. Fg is the same for both
a.
b.
c.
d.
e.
fall toward Earth
slow down
decelerate due to friction
resist any change in its motion
speed up
14. This figure shows an elevator that is accelerating
upward at 10 m/s2. A 10 kg mass hangs by a rope
inside the elevator. What is the tension in the
rope?
11. You step on the accelerator of your car and, in 10
seconds, increase the speed from 10 m/s to 30 m/s.
What force is exerted on the car to produce this
acceleration? Assume the mass of the car is 1000
kg.
a.
b.
c.
d.
1.0 N
22.0 N
2.0 N
34.0 N
10,000 N
20,000 N
2000 N
500 N
a.
b.
c.
d.
3
0N
200 N
100 N
150 N
ID: A
Quiz 2--PHYS 101--3T--Fall 2013
Answer Section
MULTIPLE CHOICE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
TOP:
ANS:
TOP:
ANS:
TOP:
ANS:
ANS:
ANS:
TOP:
ANS:
ANS:
B
PTS: 1
C
PTS: 1
B
PTS: 1
C
PTS: 1
D
PTS: 1
C
PTS: 1
B
PTS: 1
DIF: 1
4.1 Forces | 4.2 Newton's First Law | 4.3 Newton's Second Law | 4.4 Newton's Third Law
A
PTS: 1
DIF: 1
4.1 Forces | 4.2 Newton's First Law | 4.3 Newton's Second Law | 4.4 Newton's Third Law
A
PTS: 1
DIF: 2
4.1 Forces | 4.2 Newton's First Law | 4.3 Newton's Second Law | 4.4 Newton's Third Law
A
PTS: 1
C
PTS: 1
B
PTS: 1
DIF: 2
4.1 Forces | 4.2 Newton's First Law | 4.3 Newton's Second Law | 4.4 Newton's Third Law
D
PTS: 1
B
PTS: 1
1