hello quizlet
Home
Subjects
Expert solutions
Create
Study sets, textbooks, questions
Log in
Sign up
Upgrade to remove ads
Only $35.99/year
AP Physics I: Unit 2, Dynamics Principles
Flashcards
Learn
Test
Match
Flashcards
Learn
Test
Match
Terms in this set (37)
Newton's First Law (Law of Inertia)
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Net Force = 0
When an object is at rest or in constant velocity
Inertia
The tendency of an object to resist changes in its state of motion, changes in its velocity, or acceleration.
Mass is that quantity that is solely dependent upon the ______ of an object.
Inertia
In order to begin motion...
A force must be applied
Unbalanced forces cause...
Acceleration (a change in motion)
Equilibrium
A state in which opposing forces or influences are balanced.
If the forces acting upon an object are balanced, then the object...
Must not be accelerating
Force
A push or pull interaction between two objects. Forces only exist as a result of an interaction.
Unit of Force
Newtons (N)
A force is a vector quantity because it has both
Magnitude and direction
Horizontal (or vertical) net force is balanced...
When you are not accelerating
Applied Force (Fapp.)
A force which is applied to an object by a person or another object
Gravitational Force (Fg, mg, W)
The direction of a gravitational force is always directed toward the center of the earth. It is also known as the weight of an object.
Contact Forces
Interacting objects that "touch" each other
Normal Force (Fn, N)
It is a reactionary force that prevents an object from passing through a surface. The direction of a normal force is always perpendicular to the surface, and points away from the surface.
Action-at-a-distance Forces
Forces that can have an effect on an object without touching it
Friction Force (Ff, f)
The friction force is the force exerted by a surface as an object moves across it or makes an effort to move across it. The direction of a frictional force always resists sliding motion between the two surfaces.
Air Resistance Force (Fair.)
The air resistance is a special type of frictional force that acts upon objects as they travel through the air. It is most noticeable for objects that travel at high speeds (e.g., a skydiver or a downhill skier) or for objects with large surface areas.
Tension Force (Ft, T)
The tension force is the force that is transmitted through a string, rope, cable or wire when it is pulled tight by equal forces acting from opposite ends. It measures the interaction between the objects.
Spring Force (Fspring)
The spring force is the force exerted by a compressed or stretched spring upon any object that is attached to it. (3rd Law)
Free-Body Diagrams
Diagrams used to show the relative magnitude and direction of all forces acting upon an object in a given situation
Newton's Second Law
F = ma
a = F/m
Acceleration and Net Force
Directly Proportional
Acceleration and Mass
Inversely Proportional
Newton's Third Law
For every action there is an equal and opposite reaction.
The size of the forces on the first object _______the size of the force on the second object.
equals
The direction of the force on the first object is ________to the direction of the force on the second object.
opposite
Forces always come in _____- equal and opposite action-reaction force _____.
pairs
Internal forces
Do not affect motion of a system's center of mass
Center of Mass
The point in an object that moves as if all the object's mass were concentrated at that point
Coasting / Sliding
No motive force
Smooth
Frictionless
Rough
Frictional forces exist
Motionless / Stopped / At rest
Forces are negligible / balanced horizontally
Moved with <direction> acceleration.
Applied force > Frictional force
Constant Velocity
Forces are balanced
Students also viewed
AP Physics 1: Rotational Motion and Torq…
32 terms
AP Physics 1 - Unit 5 - Rotation, Energy…
28 terms
Unit 6: Waves, Sound, and Simple Harmoni…
39 terms
AP Physics Impulse & Momentum
15 terms
Sets found in the same folder
AP Physics I: Unit 4, Work and Energy Pr…
22 terms
AP Physics Unit 1: Kinematics
44 terms
AP Physics 1 - Unit 5 - Rotation, Energy…
28 terms
AP Physics 1: Rotational Motion and Torq…
32 terms
Other sets by this creator
CC 306M - Endocrine and Digestive System Terms
121 terms
CC 306M - Senses Terms
85 terms
CC 306M - Nervous System Terms
89 terms
CH128K: Nucleophilic Substitution
28 terms
Verified questions
physics
Prove that when $N$ is very large, your result approaches that of the magnetic field strength at the center of a circle.
physics
An electric motor rotating a workshop grinding wheel at $1.00 \times 102$ rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 2.00 rad/s2. (a) How long does it take the grinding wheel to stop? (b) Through how many radians has the wheel turned during the time interval found in part (a)?
physics
Imagine a toy containing two parallel, horizontal metal rods, one above the other. The top rod is free to move up and down. a. The top rod floats above the lower one. If the top rod’s direction is reversed, however, it falls down onto the lower rod. Explain why the rods could behave in this way. b. Assume that the top rod was lost and replaced with another one. In this case, the top rod falls on top of the bottom rod no matter what its orientation is. What type of replacement rod must have been used?
physics
The average density of the Sun is on the order $10^3 \mathrm{~kg} /$ $\mathrm{m}^3$. (a) Estimate the diameter of the Sun. (b) Given that the Sun subtends at an angle of about half a degree in the sky, estimate its distance from Earth.
Recommended textbook solutions
Mathematical Methods in the Physical Sciences
3rd Edition
•
ISBN: 9780471198260
(1 more)
Mary L. Boas
3,355 solutions
Atkins Physical Chemistry
10th Edition
•
ISBN: 9780199697403
Julio de Paula, Peter Atkins
1,315 solutions
Fundamentals of Physics
10th Edition
•
ISBN: 9781118230718
(2 more)
David Halliday, Jearl Walker, Robert Resnick
8,950 solutions
Sears and Zemansky's University Physics
14th Edition
•
ISBN: 9780133969290
(4 more)
Hugh D. Young, Roger A. Freedman
8,341 solutions
Other Quizlet sets
Chapter 11 + 12
24 terms
psy 250 ch 3
20 terms
Review
38 terms
Astronomy Exam 2
31 terms