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Physics Final

Physics Final (6/6)

QuestionAnswer
A stationary point that allows observers to see motion because the distance between the object and this changes. Reference point
The distance traveled in a certain amount of time (how fast) Speed
What is the unit for speed? m/sec
The speed at a certain instant of time Instantaneous speed
Traveling equal distances in equal amounts of time Constant speed
The total distance traveled in a certain amount of time Average speed
The speed in a certain direction (how fast and which way) Velocity
If Lauren can run 15 meters in 10 seconds, what is her speed? 1.5 m/s
Covering equal distances in equal amounts of time without changing direction Constant velocity
Any change in velocity Acceleration
A car accelerates from rest to a final speed of 10m/s in 5 seconds. What is the acceleration of the car? 2 m/sec/sec
A car speeds up from 10 m/s to 20 m/s in 4 seconds. What is the acceleration of the car? 2.5 m/sec/sec
A car slows down from a speed of 25 m/s to 10 m/s in 3 seconds. What is the acceleration of the car? -5 m/sec/sec
A car is traveling at 10 m/s. How much time will it take to accelerate to a final speed of 30 m/s if it can accelerate at 4 m/s? 5 seconds
A car that is at rest begins to accelerate at 5 m/sec/sec. What is the car's speed after 6 seconds? 30 m/s
A car that is traveling at 10 m/s begins to accelerate at 5 m/sec/sec. What is the car's speed after 6 seconds? 40 m/s
A car accelerates from rest at 4 m/sec/sec. Calculate the distance traveled after 0 seconds. 0 m
A car accelerates from rest at 4 m/sec/sec. Calculate the distance traveled after 2 seconds. 8 m
A car accelerates from rest at 4 m/sec/sec. Calculate the distance traveled after 3 seconds. 18 m
A car accelerates from rest at 4 m/sec/sec. Calculate the distance traveled after 10 seconds. 200 m
A car accelerates from rest at 4 m/sec/sec. Calculate the final velocity after 0 seconds. 0 m/s
A car accelerates from rest at 4 m/sec/sec. Calculate the final velocity after 2 seconds. 8 m/s
A car accelerates from rest at 4 m/sec/sec. Calculate the final velocity after 3 seconds. 12 m/s
A car accelerates from rest at 4 m/sec/sec. Calculate the final velocity after 10 seconds. 40 m/s
If the slope on a distance vs time graph is flat, that means the object is...? a) Not moving b) Constant speed c) Acceleration A
If the slope on an acceleration vs time graph is flat, that means the object is...? a) Not moving b) Constant acceleration B
If the slope on a velocity vs time graph is slanted, that means the object is...? a) Constant speed b) Acceleration B
If the slope on a velocity vs time graph is flat, that means the object is...? a) Constant speed b) Acceleration A
If the slope on a distance vs time graph is curved, that means the object is...? a) Not moving b) Constant speed c) Acceleration C
If the slope on a distance vs time graph is slanted, that means the object is...? a) Not moving b) Constant speed c) Acceleration B
The slope of a distance vs time graph shows _________. Speed
The slope of a velocity vs time graph shows _____________. Acceleration
Any push or pull of an object Force
The unit for force is__________. Newtons
The overall force on an object Net force
Shows all the forces acting on the object Force diagram
A nonzero net force that causes an object to accelerate Unbalanced force
A zero net force that does not cause an object to accelerate Balanced force
The amount of matter in an object Mass
The force of gravity pulling on an object Weight
Weight = mass * _________ Gravity
When you go to the moon, your __________ (mass/weight) stays the same. Mass
A force that opposes motion and slows down moving objects Friction
If the texture of a surface is rough, that means that there is _________ (more/less) friction More
The two forms of friction are ________________ and _______________, which means that one is stationary and the other is moving, respectfully. Static; kinetic
The three types of kinetic friction are ______________, __________________, and _______________, where in one, a surface slides over another, in the second, a surface rolls over another, and in the third, a surface moves through a fluid. Sliding friction; rolling friction; fluid friction
When the only force acting on an object is gravity. Free fall
If two different objects of different mass are dropped from the same height, the ________________ (will/will not) fall to the ground at the same time because they are in free fall. Will
Suppose a basketball is dropped from rest from a very, very high tower. What is its acceleration after 5 seconds? 9.8 m/sec/sec
Suppose a basketball is dropped from rest from a very, very high tower. What is its velocity after 5 seconds? 49 m/s
When the downward force of gravity is cancelled out by the upward force of air resistance; the object no longer accelerates. It moves at a constant speed Terminal velocity
An object that is in free fall and moves horizontally at the same time Projectile
The ability to do work or cause change Energy
What are the two forms of energy? Kinetic; potential
What are the three types of potential energy? Gravitational; elastic; chemical
What is the formula for KE? 1/2mv^2
What is the unit for energy? Joules
What is the formula for GPE? mgh
How much kinetic energy does a 0.15 baseball have if its speed is 40 m/s? 120 J
How much gravitational potential energy is stored in a 0.15 baseball if it is held 2m off the ground? 2.943 J
What law is this? Energy cannot be created or destroyed, but it can be transformed from one form to another Law of Conservation of Energy
What are the six forms of energy? (List in the order as in the acronym MENCHE) Mechanical; electromagnetic; nuclear; chemical; heat; electrical
What form of energy is this? Energy that's stored in the nucleus of an atom Sun:Fusion-2 nuclei collide together at high speeds, releasing energy as they fuse together Power plants:Fission-nucleus breaks into 2 or more nuclei which releases energy Nuclear
What form of energy is this? Energy that is stored in the chemical bonds between atoms (food, batteries, burning coal, gasoline) Chemical
What form of energy is this? Energy associated with moving electric charges (batteries, power plants sending electric currents, laptop sending electrical signals through circuits, brain controls body through electrical impulses) Electrical
What form of energy is this? Energy associated with the temperature of an object. Moving particles produce heat energy through friction (chemical reactions, heating/cooling surroundings, change in the state of matter) Heat
What form of energy is this? Energy that is carried in massless waves that are part electric and part magnetic (visible light, invisible inferred heat waves, invisible x-rays) Electromagnetic
What form of energy is this? Energy associated with the motion or position of an object (living a mass, running, kicking a football) Mechanical
What principle is this? The buoyant force on an object is equal to the weight of the fluid displaced by that object Archimedes' Principle
Suppose you jump into a pool. What is the volume of water you displace if you go halfway under? 1/2 your volume
Suppose you jump into a pool and go all the way under. What is the buoyant force? The weight of you
If an object has the same volume as water, but it weights more, it will _____. Sink
If the object ______, the object weights less than that much water. Floats
What principle is this? As the speed of a moving fluid increases, the pressure inside of that fluid decreases? Bernoulli's Principle
The pressure inside a moving fluid is ___________ (more than/less than) the pressure of the surrounding slower moving or stationary fluid. Less than
Which of Newton's laws is this? (Just put number) • Objects at rest stay at rest • Object in motion stay in motion • All of the above unless acted on by an unbalanced force with makes it accelerate • Also known as the Law of Inertia 1
Which of Newton's laws is this? (Just put number) • For every action, there is an equal and opposite reaction force • Action/reaction force pairs DO NOT cancel out because they act on different objects 3
Which of Newton's laws is this? (Just put number) • Describes the relationship between force, mass, and acceleration • If the force is constant, then as mass increases, the acceleration decreases • F=ma 2
What law is this? Opposite charges attract, while like charges repel. Law of Electric Charges
For positive charges, the arrows point ____________ (out/in) Out
The quantity that keeps an object in its state of motion Momentum
The formula for momentum is: P=mv
The unit for momentum is: Kg * m/s
What is the momentum of a 5 Kg cart traveling at a velocity of 3 m/s? 15 Kg * m/s
A force of attraction or repulsion between two types of metals (Ni, Fe, or Co) caused by the identical spin of electrons within each substance Magnetic force
The magnetic force depends on: Size + distance
The average kinetic energy of all the molecules in a substance Temperature
The movement of thermal energy from one substance to another Heat
The transfer of thermal energy by direct contact Conduction
Easily transfer thermal energy Conductors
Do not easily transfer thermal energy Insulators
The transfer of thermal energy by electromagnetic waves Radiation
The transfer of thermal energy by the movement of currents in a fluid Convection
When heated, objects __________ (expand/contract) Expand
Created by: oliva.muchnik