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Newton's Laws. From an AP Physics C course. Flashcards | StudBud
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Newton's Laws. From an AP Physics C course.
Newton's Laws. From an AP Physics C course.
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Answers
1
A 6 kg shark is moving south. A net force of 12 N north on it will cause an acceleration of
6 m/s2, north
2 m/s2, north
36 m/s2, north
2 m/s2, south
2
A 13 N and 12 N weight are hung over an Atwood's machine. The acceleration of the 13 N is
1/2.55
1
13/25
1/13
3
A ball with a weight of 1.5 N is thrown at 30° above the horizontal. At its peak,
1.5 N, down
9.8 N, up
zero N
the net force is 9.8 N, 30° below the horizontal
4
A newton is the force
of gravity on a 1 g body
of gravity on a 1 kg body
that gives a 1 kg body an acceleration of 9.8 m/s2
that gives a 1 kg body an acceleration of 1 m/s2
5
A 5 kg shark is lowered with a downward acceleration of 2.8 m/s
2
. The tension in the rope is
49 N, up
35 N, down
14 N, up
35 N, up
6
The reaction force does not cancel the action force because
the action force is greater than the reaction force
they act on different bodies
reaction force exists only after the action force is removed
they are in the same direction
7
A 9000 N cow is pushed on a level road by 4 students with a force of 500 N. NAR, a=
is 18 m/s2
is 1.8 m/s2
is 0.54 m/s2
is 0.055 m/s2
8
A book rests on a table, exerting a downward force on the table. The reaction to this force is
the force of the Earth on the book
the force of the table on the book
the force of the Earth on the table
the inertia of the book
9
A car travels east at constant velocity. The net force on the car is
west
east
zero
down
10
An object moving at constant velocity in an inertial frame must
have a net force on it
eventually stop due to graivty
not have any force of gravity acting on it
have zero net force acting on it
11
You stand on a scale in an elevator. Of the following, the scale reads the highest when
moves downward with decreasing speed
moves downward with increasing speed
moves upward with constant speed
remains stationary
12
Mass differs from weight in that
all objects have weight but some lack mass
the mass of an object is always more than its weight
mass can only be expressed in the metric system
weight is a force and mass is not
13
A 400 N steel ball at rest is suspended by a rope from the ceiling. The tension is
200 N
800 N
400 N
zero
14
The term mass refers to the same physical concept as
weight
force
acceleration
inertia
15
A circus performer of weight mg is walking along a high wire as shown. The tension in the wire
is approximately mg
is approximately mg/2
much more than mg
much less than mg
16
The mass of a body
is the same for all bodies of the same volume
is a vector
is independent of the acceleration due to gravity
is slightly different at different places on the Earth
17
The inertia of a body tends to cause the body to
fall toward the Earth
resist any change in its motion
slow down
speed up
18
2 forces are applied to a 5 kg cow. One is 6 N north. The other is 8 N, west. The acceleration
has a magnitude of 10 m/s2
has a magnitude of 2.8 m/s2
has a magnitude of 0.50 m/s2
has a magnitude of 2.0 m/s2
19
In SI units, a force is numerically equal to the ___, when the force is applied to it.
speed of the standard kilogram
acceleration of the standard kilogram
velocity of the standard kilogram
velocity of any object
20
Acceleration is always in the direction
of the net force
of the displacment
of the initial velocity
of the instantaneous velocity
