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AP Physics 1: Newton's Laws And Forces Flashcards | StudBud
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AP Physics 1: Newton's Laws And Forces
AP Physics 1: Newton's Laws And Forces
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1
In SI units, a force is numerically equal to the ___, when the force is applied to it.
velocity of the standard kilogram
speed of the standard kilogram
acceleration of the standard kilogram
velocity of any object
2
A book rests on a table, exerting a downward force on the table. The reaction to this force is
the inertia of the book
the force of the Earth on the table
the force of the Earth on the book
the force of the table on the book
3
The term mass refers to the same physical concept as
weight
force
inertia
acceleration
4
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 0.50 m/s2
has a magnitude of 2.8 m/s2
has a magnitude of 2.0 m/s2
5
That is the magnitude of F such that the Fn of the incline on the box is equal to the weight?
mg (1-sinθ)
mg cosθ
mg (1+sinθ)
mg (1-cosθ)
6
The mass of a body
is slightly different at different places on the Earth
is independent of the acceleration due to gravity
is the same for all bodies of the same volume
is a vector
7
A book and a feather are pushed off a cliff -the book reaches the bottom first. Which is true?
The book has greater mass so it experiences a greater force.
The book has a greater mass so it experiences less air rest.
The book has a greater area so it has less air resistance.
The book has greater area so it has more air resistance.
8
A car travels east at constant velocity. The net force on the car is
east
down
zero
west
9
An object moving at constant velocity in an inertial frame must
not have any force of gravity acting on it
eventually stop due to graivty
have zero net force acting on it
have a net force on it
10
Joanne exerts a force on a basketball as she throws it east. Which if always true?
The size of F on the ball is greater than the F on Joanne.
Joanne accelerates west.
The basketball pushes Joanne west.
Joanne feels no net force because she and the ball are one.
11
A newton is the force
of gravity on a 1 kg body
that gives a 1 kg body an acceleration of 1 m/s2
of gravity on a 1 g body
that gives a 1 kg body an acceleration of 9.8 m/s2
12
An elevator is moving upwards at a constant velocity of 2 m/s
2
. What is the net acceleration?
1/2 g
1/5 g
g
0g
13
A 6 kg shark is moving south. A net force of 12 N north on it will cause an acceleration of
2 m/s2, north
36 m/s2, north
2 m/s2, south
6 m/s2, north
14
What is NOT necessarily true about a 1000 N box hanging from a massless rope in equilibrium?
The net vertical force is zero.
the box is accelerating downward due to gravity at 3.2 m/s2.
The tension in the rope is 1000N.
The net force is zero.
15
An elevator is pulled up with a F=65000N. a = 1.8 m/s
2
. What is the mass of the elevator?
1700 kg.
36111 kg.
1.8 kg
5600 kg
16
A 400 N steel ball at rest is suspended by a rope from the ceiling. The tension is
200 N
zero
400 N
800 N
17
Four force act on an object. If the net acceleration is zero, which must be true?
The forces must act in the same plane.
The forces must have equal magnitude.
You can't tell unless you draw the force diagram.
The vector sum of all of the forces must be zero.
18
Acceleration is always in the direction
of the instantaneous velocity
of the initial velocity
of the net force
of the displacment
19
A 9000 N cow is pushed on a level road by 4 students with a force of 500 N. NAR, a=
is 0.055 m/s2
is 1.8 m/s2
is 18 m/s2
is 0.54 m/s2
20
Mass differs from weight in that
weight is a force and mass is not
the mass of an object is always more than its weight
mass can only be expressed in the metric system
all objects have weight but some lack mass
21
The inertia of a body tends to cause the body to
fall toward the Earth
slow down
resist any change in its motion
speed up
22
Which of the following are necessary for an object to be in equilibrium?
Net mass is zero.
Net acceleration is zero.
Net velocity is zero.
Net force is zero.
23
A circus performer of weight mg is walking along a high wire as shown. The tension in the wire
is approximately mg/2
is approximately mg
much more than mg
much less than mg
24
You stand on a scale in an elevator. Of the following, the scale reads the highest when
moves upward with constant speed
remains stationary
moves downward with decreasing speed
moves downward with increasing speed
25
The reaction force does not cancel the action force because
they act on different bodies
reaction force exists only after the action force is removed
they are in the same direction
the action force is greater than the reaction force
26
A ball with a weight of 1.5 N is thrown at 30° above the horizontal. At its peak,
1.5 N, down
zero N
the net force is 9.8 N, 30° below the horizontal
9.8 N, up
27
A 13 N and 12 N weight are hung over an Atwood's machine. The acceleration of the 13 N is
13g/25
g/25
g/13
g
28
A 5 kg shark is lowered with a downward acceleration of 2.8 m/s
2
. The tension in the rope is
14 N, up
35 N, down
49 N, up
35 N, up
29
You just kicked the tires on your car and your toe hurts. Why?
Newton's Law of Universal gravitation
Newton's 2nd Law of motion
Newton's 3rd Law of motion
Newton's 1st Law of Motion
