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Test Description: Chapter 2 Test
Instructions: Answer all questions to get your test result.
1) Friction acts in a direction ____to the direction of an object's motion.
A
unrelated
B
perpendicular
C
equal
D
opposite
2) Unless an object at rest is acted upon by a force, it stays at rest due to its
A
inertia
B
gravity
C
friction
D
matter
3) A 10 kg ball is accelerated 500 m/s^2 by a force of
A
5000 N
B
1/50 N
C
50 N
D
500 N
4) The momentum of a 1500 kg car traveling at a velocity of 10 m/s is
A
15 m/s^2
B
15000 N
C
150 N
D
15000 kg(m/s)
5) A(n) ______ can cause an object's motion to change.
A
balanced force
B
weight
C
inertia
D
unbalanced force
6) The amount of matter in an object is called its
A
weight
B
force
C
mass
D
inertia
7) Newton's second law of motion states the relationship of mass, acceleration, and force. It says that
A
force equals mass times acceleration.
B
force equals mass divided by acceleration.
C
every object attracts every other object in the universe.
D
force equals acceleration divided by mass.
8) A(n) ______ causes objects to move in a circle.
A
centripetal force
B
terminal velocity
C
acceleration
D
large weight
9) The unit of force, a newton, if equal to
A
kg (m/s)
B
kg (m/s^2)
C
the amount of mass in an object
D
mass x velocity
10) An objet in free fall ____ until it reaches terminal velocity.
A
decreases in mass
B
slows down
C
accelerates
D
is unbalanced
11) Weight is the measure of the force of _____ on an object.
A
gravity
B
the moon
C
Earth
D
acceleration
12) A newton is a unit of _______.
A
acceleration
B
force
C
length
D
mass
13) Air rushing against an airplane is an example of ______ friction.
A
true
B
force
C
air resistance
D
fluid
14) The momentum of an object depends on its mass and ________.
A
weight
B
acceleration
C
velocity
D
speed
15) The total momentum of any group of objects remains the same unless an outside ____ acts on the objects.
A
acceleration
B
object
C
velocity
D
force
16) Forces can be added together only if they are acting on different objects.
A
True
B
False
17) According to Newton's second law of motion, acceleration increases as force increases, if mass stays the same.
A
True
B
False
18) The force exerted by gravity is stronger if two objects are closer.
A
False
B
True
19) The force of friction acts between all objects in the universe.
A
False
B
True
20) A satellite in orbit around Earth is always falling towards Earth.
A
False
B
True
*select an answer for all questions
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