# Shared Flashcard Set

## Details

Midterm
review
90
Physics
10/04/2015

Term
 what is the formula for impulse?
Definition
 force times the change in velocity
Term
 What is impulse measured in?
Definition
 N*s
Term
 Whats the formula for momentum?
Definition
 m times the change in velocity
Term
 What are the units for momentum?
Definition
 kg*m/s
Term
 What is the equivalent of impulse?
Definition
 momentum
Term
 What can result from either a large force and short time or a mislay force and long time?
Definition
 a large impulse
Term
 What is the product of a rotating object's moment of inertia and angular velocity?
Definition
 angular momentum
Term
 The angular velocity of a rotating object changes only if what is applied to it?
Definition
 torque
Term
 Since mass cannot change, if momentum is constant, what else is constant?
Definition
 velocity
Term
 What kind of system is one with no outside forces?
Definition
 closed system
Term
 In a closed system, what happens to momentum?
Definition
 it is conserved
Term
 If two objects of varying size collide, the forces they exert on each other will be equal and opposite in direction. Which law does this follow?
Definition
 Newton's 3rd Law
Term
 What is the product of average force on an object and the time interval over which it acts?
Definition
 impulse
Term
 If a rolling ball hits a stationary ball and comes to a stop, what of the rolling ball's is transferred to the stationary ball?
Definition
 momentum
Term
 If a rolling ball hits a stationary ball and comes to a stop, all of the rolling ball's momentum is transferred to the stationary ball, and what will it do?
Definition
 roll with the same velocity in the same direction
Term
 What is it called when the net external force on a closed system is zero?
Definition
 isolated system
Term
 What is the formula for Work?
Definition
 Fd
Term
 What are the units for work?
Definition
 N*m or Joules
Term
 What is the ability of an object to produce a change in itself or the world around it?
Definition
 energy
Term
 What is energy of motion?
Definition
 kinetic
Term
 What is the formula for energy of motion (kinetic)?
Definition
 .5mv^2
Term
 What are the units for all energy?
Definition
 Joules
Term
 What is one Joule?
Definition
 1kg*m^2/s^2
Term
 Who is the Joule named after?
Definition
 James Joule
Term
 In what is "when work is done on an object, the result is a change in kinetic energy" stated?
Definition
 Work Energy Theorem
Term
 What is the transfer of energy by mechanical means?
Definition
 work
Term
 If force and distance are at right angles, what is work?
Definition
 zero
Term
Definition
 an apple
Term
 A force exerted which way to the motion does no work?
Definition
 perpendicular
Term
 What is the formula for power?
Definition
 work/time
Term
 What is the rate at which external force changes the energy of a system?
Definition
 power
Term
 Time affects power but not what?
Definition
 work
Term
 A machine eases the load by changing what of a force to match the force to the capability of machine or person?
Definition
 magnitude or direction
Term
 What is not a source of energy?
Definition
 machine
Term
 What does a machine aid in?
Definition
 the transfer of energy, but it cannot create it
Term
 What is the work a machine does?
Definition
 output work
Term
 What is the kind of work that you do?
Definition
 input work
Term
 Which type of work cannot exceed the other?
Definition
 output
Term
 What is the force exerted by the machine called?
Definition
 resistance force
Term
 What is the force exerted by a person on a machine?
Definition
 effort force
Term
 What is the ratio of output work to input work?
Definition
 efficiency
Term
 What is equal to the displacement of a load?
Definition
Term
 What is the ratio of resistance force to effort force?
Definition
Term
 What does a machine do if the mechanical advantage is greater than one?
Definition
 increases the force applied by a person
Term
 What kind of machine has equal input and output work?
Definition
 ideal machine
Term
 What is machine consisting of two or more simple machines that are linked in such a way that the resistance force of one machine becomes the effort force to the second?
Definition
 compound machine
Term
 List all the simple machines from the notes.
Definition
 lever, pulley, wheel and axle, inclined plane, wedge, screw
Term
 length
Definition
 meters
Term
 time
Definition
 seconds
Term
 mass
Definition
 kilograms
Term
 temperatrue
Definition
 kelvin
Term
 electric current
Definition
 ampere
Term
 luminous intensity
Definition
 candela
Term
 amount of a substance
Definition
 mole
Term
 What are quants that include magnitude and direction?
Definition
 vectors
Term
 What are quantities that involve only numbers with no indication of direction?
Definition
 scalars
Term
 What is a push or pull that causes a change in motion?
Definition
 force
Term
 What is the force exerted by a surface on an object and acts perpendicular to and away from a surface?
Definition
 normal force
Term
 what acts to oppose sliding motion between surfaces?
Definition
 friction
Term
 what cases motion by acting in the same direction as the acceleration of the object?
Definition
 thrust force
Term
 What ist he force due to gravitational attraction between two objects termed?
Definition
 weight
Term
 What does the acronym LASER stand for?
Definition
 light amplification by stimulated emission of radiation
Term
 What generic equation represents a direct relationship?
Definition
 y=kx
Term
 What kind of line does a direct relationship form?
Definition
 straight
Term
 What is the generic equation for an inverse relationship?
Definition
 y=k/x
Term
 What kind of graph does an inverse relationship form?
Definition
 hyperbola
Term
 What is the generic equation for a quadratic relationship?
Definition
 y=kx^2
Term
 What kind of graph does a quadratic equation form?
Definition
 parabola
Term
 What is the value with units of the speed of light?
Definition
 3 x 10^8 m/s
Term
 What is the mass of the Earth with units?
Definition
 5.98 x 10^24 kg
Term
 What is the mass with units of the Sun?
Definition
 1.99 x 10^30
Term
 what is the numerical value with unites for the charge of an electron?
Definition
 1.602 x 10^-19 Coulombs
Term
 What is the symbol for acceleration due to gravity?
Definition
 g
Term
 What is the value of acceleration due to gravity on the moon?
Definition
 1.62 m/s^2
Term
 What is the acceleration due to gravity on Earth?
Definition
 9.8 m/s^2
Term
 What is the symbol for universal gravitation?
Definition
 G
Term
 What is the value of G?
Definition
 6.67 x 10^-11 Nm^2/kg^2
Term
 When a planet gets closer to the Sun, what happens to its speed?
Definition
 it speeds up
Term
 What was Cavendish's famous experiment called?
Definition
 "weighing the Earth"
Term
 For an object moving with circular motion, the direction of centripetal acceleration is always towards where?
Definition
 center of the circle
Term
 What is the distance between the earth and the sun often expressed as?
Definition
 one astronomical unit
Term
 What does the slope of a position time graph represent?
Definition
 velocity
Term
 what does the slope of a velocity time graph represent?
Definition
 acceleration
Term
 What does the slope of the tangent to the curve on a velocity time graph represent?
Definition
 instantaneous acceleration
Term
 What does a flat line on a velocity time graph represent?
Definition
 constant velocity and zero acceleration
Term
 What does a flat line on a position time graph represent?
Definition
 zero velocity and standing still
Term
 What is the formula for Newton's law of universal gravitation?
Definition
 F=Gm1m2/r^2
Term
 If the average velocity a particle is zero in the same time interval then what is the displacement?
Definition
 zero
Term
 What is the lowest possible temperature for matter?
Definition
 absolute zero
Term
 What is absolute zero in celsius?
Definition
 -273.15
Supporting users have an ad free experience!