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Chapter 12-Force
Test Description: Review
Instructions: Answer all questions to get your test result.
1) Newton's first law of motion states that an object remains at rest unless a ___________ force acts on it.
A
net
B
balanced
C
frictional
D
gravitational
2) If you squeeze the bottom of a closed tube of toothpaste, the pressure is increased _______________.
A
everywhere in the tube
B
on the bottom of the tube
C
on the sides of the tube
D
on the top of the tube
3) When a diver jumps off a diving board, gravity pulls him or her down to the water. What is the reaction force to Earth's gravity?
A
The diver pulls Earth up.
B
Air resistance slows the diver.
C
The diver's legs push against the board.
D
Friction between the diver and water slows the diver.
4) A Feather falls through the air more slowly than a brick because of
A
air resistance
B
inertia
C
momentum
D
gravity
5) If gravity did not affect the path of a horizontally thrown ball, the ball would ____________.
A
travel horizontally
B
fall straight down
C
follow a curved path
D
go straight up
6) The upward force on an object falling through the air is ______________.
A
inertia
B
gravity
C
terminal velocity
D
air resistance
7) The relationship among force, mass, and acceleration is stated in ________________.
A
the law of the conservation of momentum
B
Newton's first law of motion
C
Newton's third law of motion
D
Newton's second law of motion
8) A feather falls through the air more slowly than a brick because of ________________.
A
momentum
B
air resistance
C
gravity
D
inertia
9) Density is given in ________.
A
Pa/cm3
B
g/s2
C
N/m2
D
g/cm3
10) In a hydraulic system, the force exerted on the large piston is ____________________ the force exerted on the small piston.
A
not related to
B
the same as
C
less than
D
greater than
11) Forces that are equal in size but opposite in direction are ________________.
A
frictional forces
B
net forces
C
inertial forces
D
balanced forces
12) According to Archimedes, the buoyant force on an object is equal to ________________.
A
the density of the fluid
B
the fluid pressure on the object
C
the weight of the fluid displaced
D
the weight of the object
13) Momentum is the measure of ______________.
A
the amount of matter in an object
B
how hard it is to stop an object
C
the tendency of an object to change its motion
D
the amount of force acting in an object
14) I f you exert a force on an object in motion, you will change its __________________.
A
momentum
B
mass
C
inertia
D
weight
15) When a toy truck collides into a toy car, the momentum of ____________ is the same before and after the collision.
A
the car
B
the truck
C
the truck times the car
D
the truck plus the car
16) If you are standing on both feet and then stand on one foot, you have ______________________________ the pressure on the ground.
A
decreased
B
depends on your motion
C
increased
D
not changed
17) If you blow between tow table tennis balls suspended about 2 cm apart, the balls will __________________.
A
move toward each other
B
move away from each other
C
move back and forth
D
not move
18) If you are standing on one foot and then put both feet down, you have ________ the force on the ground.
A
decreased
B
increased
C
not changed
D
can't tell
19) The statement for every action there is an equal but opposite reaction is a statement of ______________.
A
Newton's first law
B
Newton's third law
C
the law of of the conservation of momentum
D
Newton's second law
*select an answer for all questions
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