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Physics Forces, Friction, Newtons Laws Flashcards | StudBud
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Physics Forces, Friction, Newtons Laws
Physics Forces, Friction, Newtons Laws
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Physics Forces, Friction, Newtons Laws
Flashcards
30 cards
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Questions
30
Answers
1
Which of the following statements does NOT describe force?
Force causes objects at rest to remain stationary.
Force causes objects to start moving.
Force causes objects to change direction
Force causes objects to stop moving
2
Match the correct definition with the term Kinetic or sliding
The resistance force of a gas/liquid as an object passes
The resistance force between a surface and a rolling object
The resistance force between surfaces already in motion.
The force that must be overcome to start an object in motion
3
As a 620-N man sits on the floor, the floor exerts a force on him of
1240 N
6.2 N
620 N
6200 N
4
If a nonzero net force is acting on an object, then the object is definitely
moving with a constant velocity
at rest
losing mass
being accelerated
5
Which are simultaneous equal but opposite forces resulting from the interaction of two objects?
Action-Reaction Pairs
Field forces
Gravitational Forces
Net External Forces
6
How much does a 1.0-kg bag of tools weigh?
19.6 N
9.8 N
7.6 N
2.4 N
7
Which has more mass, a kilogram of feathers or a kilogram of iron?
The feathers
The iron
Neither they both have the same mass
8
Match the correct definition with the term Rolling
The resistance force of a gas/liquid as an object passes
The resistance force between surface and a rolling object
The force that must be overcome to start an object in motion
The resistance force between surfaces already in motion
9
Match the following term with the correct definition: Friction
The metric unit for force
Mass x Gravity due to acceleration (mg)
Force that acts to oppose motion between tow moving objects
The amount of matter in an object
10
The normal force
acts perpendicular to a surface.
equals f in magnitude
points vertically upward.
is a scalar quantity.
11
A measure of the quantity of matter is
force
weight
density
mass
12
The SI unit for acceleration is
mph
Δv/t
ft/sec2
m/s2
13
What is newtons first law?
Law of Inertia
Law of Interaction
Law of Acceleration
14
Match the following term with the correct definition: Newtons Second Law
For every force there is an equal & opposite force
F=MA
15
Match the following term with the correct definition: Newton
The amount of matter in an object
The metric unit for force
Mass x Gravity due to acceleration (mg)
Force that acts to oppose motion between tow moving objects
16
Which of the following is the tendency of an object to maintain its state of motion?
acceleration
velocity
inertia
force
17
What causes a moving object to change direction?
force
inertia
acceleration
velocity
18
For every action there is an equal but opposite reaction. Which Newton law is this?
Third
Second
First
19
A girl pulls on a 9-kg wagon with a constant force of 27 N. What is the wagon's acceleration?
0.3 m/s2
3 m/s2
243 m/s2
27m/s2
20
What are the units of the coefficient of friction?
1/N
N
The coefficient of friction has no units.
N2
21
Which of the following is the cause of an acceleration or a change in an objects motion?
inertia
velocity
speed
force
22
Whats the difference between mass and weight?
Mass doesn't depend on gravity & weight does
They both depend on gravity
There's no difference
Mass depends on gravity & weight doesn't
23
Match the following term with the correct definition: Mass
The metric unit for force
The amount of matter in an object
Mass x Gravity due to acceleration (mg)
Force that acts to oppose motion between two moving objects
24
Match the correct definition with the term Static
The resistance force of a gas/liquid as an object passes
The resistance force between surfaces already in motion
The resistance force between a surface and a rolling object
The force that must be overcome to start an object in motion
25
Match the following term with the correct definition: weight
The metric unit for force
Mass x Gravity due to acceleration (mg)
The amount of matter in an object
Force that acts to oppose motion between two moving objects
26
An object weighs 30 N on Earth. A second weighs 30 N on the moon. Which has the greater mass?
the one on earth
not enough information to say
they have the same mass
the one on the moon
27
A truck exerts a force of 1500 N on a car, accelerating it at 2 m/s
2
. The mass of the car is
1500 kg
250 kg
375 kg
750 kg
28
Match the correct definition with the term Fluid
The resistance force of a gas/liquid as an object passes
The resistance force between surfaces already in motion
The force that must be overcome to start an object in motion
The resistance force between a surface and a rolling object
29
A change in the force of gravity acting on an object will affect the objects?
weight
frictional force
mass
inertia
30
To determine the force of sliding friction, which of the following is correct?
FF=FN/μ
FF=μFN
FN=μFF
