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# physics finale

Question | Answer |
---|---|

The measure of inertia of a body is given by: | its mass |

In the absence of anet force an object will always: | do nothing |

The unit "Newton" is given by what base units: | kg*m/s^(2) |

State Newtons first law of motion: | objects coninue in a state of rest/constant velocity unless compelled to change |

For an object in equilibrium what is not true? | no net force acts on the object |

Friction is proportional to: | the normal force |

The angle of respose is: | the angle of an inclined plane at which a body whould begin to slide |

What type of basic force acts on a car turning a corner at constant speed on level road? | friction |

What type of basic force acts on a Planet cicling the Sun? | gravity |

Ignoring friction, moving an object to a height of 5 ft takes (same/less/more) work on a steep ramp compared to gentle ramp slope | same |

The work done by firction is an example of what type of energy? | non-conservative |

Compared to yesterday, you do three times as much work in one third the time. Your power input is: | 9 times yesterday (P=W/T) |

What is the Work Energy Theorem? | When a net external force does work, W, on an object, the KE energy changes from initial to final. The difference between these valuse is the work (W= .5mv(f)^2-.5mv(i)^2 |

if a block slide horizontally whats the work done by gravity? | 0 |

If a block slides horizontally in what direction does friction act? | negative |

A baseball player follows through with his swing to increase what? | increase the impulse imparted on the ball |

In an inelastic collision what is conserved? | momentum |

whats the definition of impulse? | force applied over a period of time |

What were the name of the two atomic bombs dropped on Japan? | Fat man and Little boy |

Stepping on the gas as one drives around a circular track increases what? | centripital and tangential acceleration |

On which of the following is the moment of inertia of a body not dependent? | its velocity |

Decreasing the mass at the end of a simple pendulum will: | have no effect on the period or frequency |

Starting from rest at the same height, wich will reach the bottom first? | almost always the sphere |

Whats the translational and rotational expression for displacement? | theda and s |

Whats the translational and rotational expression for inertia? | I and m |

Whats the translational and rotational expression for velocity? | v and w |

Whats the translational and rotational expression for acceleration? | a and alpha |

The pressure at depth h in a liquid column is independent of the? | shape of the container the liquid is in |

Pressure applied to an enclosed fluid is transmitted in all directions to eery portion of the fluid describes what? | pascals principle |

When one stretches liquorice, the stress given by: | the applied force per unit area |

define pressure? | force applied over area |

On a Cartesian axis the y component of a vector is generally associated with? | sine |

the motion of an object projected at an angle consists of a uniform downward acceleration combined with: | uniform horizontal velocity |

An object moving at constant velocity what is not true? | one lone force acts on the object |

A plot of velocity versus time for free fall would look like a: | line with a negative slope |

two objects are seperated by a distance R, if one object is replaced by another having twice as much mass and the distance is doubled, what is the gravitational force? | half as much |

Which ratio gives the tangent? | opp/adj |

Whats the translational and rotational expression for Newtons second law? | t=I(alpha), F=ma |

if two cars are going at the same speed around a track, the track that has a tighter curve has greater what? | centripital acceleration |

Car J moves twice as fast as car K, and car J has half the mass of car K. the KE of car J is____ the kinetic energy of car K | twice |

On which of the following is the moment of inertia of a body not dependent? | velocity |

you are in an elevator in a tall building located near the equator. As you ride from the ground floor to top, your tangential speed due to earth rotation does what? | increases |

A person is riding a Ferris wheel. After one complete turn, the net work done on the person by gravitatioal force is: | zero |

The center of mass of which object would not lie withing the body? (baseball, brick, frisbee, book) | frisbee |

The speed of a setellite in orbit does not depend on what? | its mass |

The linear conservaion of a system of objecs is conserved if: | there are no external forces acting on the system |

An ice skater is spining on a frictionless ice with her arms extended outward, she pulls her arms in reducing moment of interia, what happens to her rotational KE? | increases because angular speed is larger |

Whats is the mechanical equivalent of heat? | 1 cal= 4.186 joules |

If no heat is exchanged with the surroundings the process is? | adiabatic |

Decreasing the length of a simple pendulum will: | decrease the period |

If you doubled the speed of every atom in a montoomic ideal gas, the Kelvin temp would change by a factor of? | 4 |

A blackbody at half the Kelvin Temp pf another blackbody with the same surface area will radiate ____ the thermal energy. | 1/16 |

Window A on a sub has twice the radius that window B has, if they are at the same depth which has a grater pressure acting on it? | the same amount |

A monotomic ideal gas is thermally insulated, so no heat can flow between it and its surroundings. Is it possible for the temp of the gas to rise? | yes. if work is done on the gas |

whats the work done by a isochoric process? | 0, only pressure increases |

whats the work done by a isobaric process? | w=P(delta)V only volume changes |

Whats the second law of thermodynamcs? | heat flow spontaneously from hot to cold, not the other way |

Ideal gas law is: | PV=nRT |

What is the universal gas constant? | R= 8.315 j/(mol-K) |

Whats the total internal energy for an ideal monotomic gas? | U=(3/2)nRT or (3/2)nkT |

What is the zeroth law of thermodynamics? | gives us the ability to measure the temp of bodies |

what is boltmans constant? | k, 1.38x10^-23J/K, or R/Na |

Whats the latent heat of fusion? | 80kcal/kg |

Whats the latent heat of vaporization? | 540 kcal/kg |