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