68 Matching questions
- contact force
- free body diagram
- buoyant force and the weight
- force of friction (f)
- Assumptions with Newton's Laws
- Pascal's Principle
- fun fact
- Newton's Third Law of Motion
- conculsions of the force table demo
- 1st law implications
- kinetic friction
- buoyant force
- apparent weight
- 1. Strong nuclear force
2. Electromagnetic force
3. Weak nuclear force
- Newton's First Law of Motion: Law of Inertia
- static friction
- weak nuclear force
- Archimedes Principal
- strong nuclear force
- classical mechanics
- downward, downward
- electromagnetic force
- surface imperfections and intermolecular forces
- net force
- universal; location
- force pump
- normal force
- inclined planes
- static equilibrium
- Newton's Second Law of Motion
- pressure and depth
- floating object
- 1.surface material
2. normal force of each surface on the other
- Weight down and Drag/Air Resistance up
- atmospheric pressure
- dynamic equilibrium
- field force
- terminal velocity
- a a force pushing against a specific area of a surface. (force/area)
- b objects don't accelerate downward forever - at some point their velocity becomes _____________.
- c the force exerted by a fluid depends on the height of fluid above it; the deeper the object, the more pressure.
- d The direction of the f is opposite the direction of motion
Friction is proportional to the normal n
f = µ n (fyi 0 < μ < 1)
- e When you apply a force to a confined fluid (a closed system), that pressure is applied equally to all parts of the fluid
- f SI units for inertia are _____
- g the tendency of an object to continue in its original motion (or resist change in motion)
- h mass is ____________; weight depends upon the ___________.
- i non-moving fluids (ex. pressure, floating)
- j a human's terminal velocity is about 150 mph; an ant's is so low that it can fall far and not get hurt.
- k force is a __________ quantity.
- l a gas or liquid (both flow)
- m If the object is less dense than the fluid,
the object experiences a net _____________ force
- n 1. Space objects will move forever once set in motion.
2. Friction and air resistance are the net forces that usually slow objects.
- o If the object is more dense than the fluid:
The net force is ______________, so
The object accelerates _________________
- p Whether an object sinks or floats depends on the .........
- q force of surface on object
1.Perpendicular to surface
2. Acts opposite to gravity
- r *Set the x-axis along the incline and y-axis perpendicular to the incline
*Normal points along y-axis
*Weight points straight down (break into components)
*Friction acts along x-axis
- s The µs and µk are _____________ of the area of contact
- t the tension on a rope is the __________ at all points on the rope.
- u force on a rope
- v the gravitational pull on an object; always points straight down
- w acts when the object is in motion; f is constant while in motion
- x force units are measured in ____________
- y very short range and very weak; responsible for radioactive decay.
- z a push or pull
- aa resistance to motion
- ab acts to keep the object from moving; if Fa increases, so does ƒs
- ac touching
- ad the sum of all forces on an object
- ae If ΣF (net force) = 0, then there is
- af What are the four fundamental forces of nature (field)?
- ag constant speed
- ah describes the relationship between the motion of objects in our everyday world and the forces acting on them
- ai your weight in water
(it's less than your weight in air because FB pushes upward)
- aj always attractive, and acts between all matter in the Universe; weak, but very long ranged; it's the dominant force in the universe for shaping galaxies and stars.
- ak 1.Balancing forces involves vector addition.
2.The sum of the forces involves considering x- and y-direction forces.
3.Objects in equilibrium have their forces balanced in both x- and y- directions.
- al weight equation
- am __________ is a measure of inertia
- an caused by 100 km of air above us
- ao strongest force; attractive force that holds the nuclei of atoms together.
- ap Means ΣF = 0
there is no acceleration.
(there must be no net torque too)
- aq an object at rest stays at rest and object in motion stays in motion unless acted upon by a net external force.
- ar objects accelerating ___________ seem lighter.
- as static friction (fs) is ___________ than kinetic friction(fk)
- at Objects behave as particles
Masses of strings are negligible
Interested only in the forces acting on the object
(neglect reaction forces)
- au *The object is in static equilibrium
*The upward buoyant force is balanced by the downward force of gravity
- av µ depends on the _________ of surfaces in contact
- aw factors of friction
- ax 1. Every action has an equal and opposite reaction
2. Forces always occur in pairs
3. Action and reaction forces must occur on 2 separate objects
4. Equal in magnitude but opposite in direction
- ay If an object's weight < buoyant force, then it _______.
- az If an object's weight > buoyant force, then it ________.
- ba inertia is a ___________ quantity
- bb an object's terminal velocity depends on the object's _____________.
- bc ________ scales display the normal force; they are they are the same when a=0.
- bd gravity, charges, magnets
- be falling objects have 2 forces on them: What are they?
- bf Pressure is transferred through a fluid.
An applied small Force on a small Area transmits a big Force on a big Area.
Ex: car brakes, car lift
- bg a drawing showing all forces on an object
- bh acts upward on an object in a fluid making an object feel lighter.
- bi When the upward Fair resistance = the downward Fgravity, the Fnet = ____.
- bj friction is caused by......
- bk constant velocity; a=0
- bl not moving; a=0
- bm F=ma
If a constant force is applied to an object,
it will ACCELERATE
- bn long-ranged but weak; attractive or repulsive force between objects carrying electrical charge.
- bo moves fluid by changing the pressure in the fluid
- bp The buoyant force on an object equals the weight of water displaced by the object.