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