Dr. Bullock
FORM - A
2.54 centimeter = 1 inch
1 kilometer = 0.62 mile
5280 feet = 1 mile
1 yard = 36 inches
Physical Science Exam 2
F = p/t
aC = v2/r
1 cm3 water = 1 gram
 = mass/Volume
Momentum = mass x velocity
F = ma
Each question is worth 5 points distribute each point on one line of the scantron.
Question 1-5
Aristotle came up with the earliest theory of the way things moved. Its was based on
motion that could maintain itself without the aid of an outside agent which is known as
a) violent motion
b) inertia
c) natural motion
d) ether
e) none of these
Question 6-10
The slope of the relation pictured at right is:
Velocity (m/s)
a) v/t
b) a constant
c) the rate of change of velocity with time
d) acceleration
e) all of the above
Question 11-15
What does the y-intercept of the relation pictured represent:
a) v/t
b) initial velocity
c) the rate of change of velocity with time
d) acceleration
e) all of the above
Question 16-20
If a boat sails 6 km west and then 8 km north in 2 hours, the total distance traveled is
_____ and its average speed is _____.
a) 14 km, 14 km/hr
b) 10 km, 5 km/hr
c) 14 km, 7 km/hr
d) 7 km, 7 km/hr
e) 14 km, 4 km/hr
Time (s)
Dr. Bullock
FORM - A
Physical Science Exam 2
Question 21-25
From the graph above.
Which object(s) is traveling with a constant non-zero velocity?
a) A
b) B
c) C
d) D
e) A, E
Question 26-30
From the graph above.
Which object(s) is traveling with constant non-zero acceleration?
a) A
b) B
c) C, D
d) B, E
e) E
Question 31-35
From the graph above
Which object(s) are accelerating?
a) A
b) A, B, E
c) C, D, E
d) D, E
e) E
Question 36-40
The weight of an object is:
a) the quantity of matter it contains
b) the force with which it is attracted by gravity
c) identical to its inertia
d) the same quantity as its mass, except expressed in different units
e) none of these
Dr. Bullock
FORM - A
Physical Science Exam 2
Question 41-45
A person is standing on a spring-type bathroom scale in an elevator. When the elevator is
at rest, the spring scale reads a weight of 800 N. When the elevator starts to move, the
scale indicates a reading of 600 N. The elevator, therefore, has:
a) a constant downward speed
b) an upward acceleration
c) an acceleration of zero
d) a constant upward speed
e) a downward acceleration
Question 46-50
A body with a mass of 2 kg is observed to have an acceleration of 4 m/s2. The net force
acting on the body must be:
a) 2 kg-m
b) 6 newtons
c) 1 ft-pound
d) 8 newtons
e) 0.5 newtons
Question 51-55
The forces shown in the picture below are pulling/pushing the object. What is the net
Force acting on the object?
9 Newtons
8 Newtons
3 Newtons
a)
b)
c)
d)
e)
8 Newtons
9 Newtons
20 Newtons
17 Newtons
14 Newtons
Question 56-60
A race car with a mass of 1200 kg accelerates from rest to a velocity of 60 m/s in 10
seconds.
The final velocity of the race car was:
a) 60 m/s
b) 0 m/s
c) 30 m/s
d) 6 m/s
e) 3 m/s
Question 61-65
A race car with a mass of 1200 kg accelerates from rest to a velocity of 60 m/s in 10
seconds.
The acceleration of the race car was:
a) 0 m/s2
b) 60 m/s
c) 6 m/s2
d) 30 m/s
e) 3 m/s2
Dr. Bullock
FORM - A
Physical Science Exam 2
Question 66-70
A race car with a mass of 1200 kg accelerates from rest to a velocity of 60 m/s in 10
seconds.
If the time were doubled from 10 seconds to 20 seconds then the total distance the race
car traveled would:
a) double
b) remain constant
c) triple
d) quadruple
e) increase by a factor of 20
Question 71-75
A race car with a mass of 1200 kg accelerates from rest to a velocity of 60 m/s in 10
seconds.
The force provided by the engine was:
a) 3600 J
b) 7200 J
c) 3600 N
d) 7200 N
e) 3600 N-m
Question 76-80
An object with mass, m travels at a speed v. The same object now travels with speed 2v.
What has happened to the object’s momentum?
a)
Increased by a factor of 2
b)
Decreased by a factor of 2
c)
Unchanged
d)
Increased by a factor of 4
e)
Increased by a factor of 6
Question 81-85
A lump of crud (mass = 10 kg) flies through the air with an initial velocity of 80 m/s and
slams into an initially stationary lump of goo (mass 30 kg). If they stick together
afterwards, what is the new velocity of the wad of crud and goo?
a) 20 m/s
b) 40 m/s
c) 60 m/s
d) 10 m/s
e) 4 m/s
Question 86-90
A 1 kg pool ball travels at 10 m/s, West across a pool table and has a perfectly elastic
collision with another pool ball of the same mass. At what velocity does the second ball
travel after the collision?
a) 10 m/s, East
b) 10 m/s, West
c) 8 m/s, West
d) 8 m/s, East
e) 0 m/s
Dr. Bullock
FORM - A
Physical Science Exam 2
Question 91-95
A 100 kg rifle recoils with a speed of 10 m/s when a 100 g bullet is fired from the
muzzle. At what speed must the bullet be traveling?
a) 370 m/s
b) 10 m/s
c) 100 m/s
d) 1,000 m/s
e) 10,000 m/s
Question 96-100
Six balls hang from strings pictured below. How many balls will fly out to the right
when the two balls on the left collide at the bottom of their swing if this is a perfectly
elastic collision?
a) none
b) one
c) two
d) three
e) four
2m m
m m
m
m