| A | B |
|---|
| The length of a force vector represents the | Magnitude of the force |
| A free body diagram represents | The object, forces as vectors, forces exerted on the object |
| A crate is released on a frictionless plank inclined at angle theta with respect to the horizontal. What is the relationship? | F(sub x) = 0 |
| A car goes forward along a level road at constant velocity. The additional force needed to bring the car into equilibrium is | Zero |
| How does the coefficient of static friction for two surfaces in contact compare to the coefficient of kinetic friction for the same two surfaces? | The force of static friction is more |
| When adding vectors graphically, one does NOT | Choose a scale |
| The force of kinetic friction between a box sliding on a surface depends on the | Normal force |
| An object at rest on a horizontal surface has a weight of 200 N. In order to move the box a minimum force of 20 N is required. The coefficient of static friction is | 0.10 |
| The coefficient of static fiction is ___ the coefficient of kinetic friction. | More than |
| The SI unit of force is the | Newton |
| What is the relationship between Newtons and kg/m/s? | 1 N = 1 kg*m/s^2 |
| As you push a cereal box across a tabletop at constant velocity, the sliding friction acting on the cereal box | Equals the force of the push |
| An orange might roll off your cafeteria tray when you stop suddenly because of | The orange's inertia |
| If a force of 10 N is applied to an object with a mass of 1 kg, the object will accelerate at | 10 m/s^2 |
| Your weight equals your | Mass times the acceleration due to gravity |
| The acceleration due to gravity on the surface of Mars is about one-third the acceleration due to gravity on Earth's surface. The weight of a space probe on the surface of Mars is about | One-third its weight on Earth's surface |
| Newton's third law of motion describes | Action and reaction forces |
| A pull exerted by a string, rope, or cable is called a ____ force | Tension |
| The support force due to the force of gravity acting on an object in contact with a table is also called the ___ force and acts ___ to the table | Normal, perpendicular |
| Galileo proved that heaver objects fall faster than lighter ones | False |
| When the only force that acts on a falling object is due to gravity, an object is in free fall | True |
| Constant acceleration means constant speed and constant direction | False |
| The procedure is the part of the lab that answers the purpose, explains errors, and states difficult parts | False |
| The position-time graph of an object moving with a constant average velocity is always a straight line | True |
| Average Acceleration | The slope of the velocity-time graph |
| Displacement | Change in position, has both magnitude and direction |
| Speed | Distance traveled per unit time |
| Velocity | The slope of the position-time graph |
| What (concerning velocity, distance, displacement, speed) is a pair of vector quantities? | Velocity and displacement |
| What is an example, using a cat and a tree, of negative displacement? | A cat jumping to the ground from a tree limb |
| What is the SI unit of velocity? | Meter per second |
| What is the equation for acceleration? | a = delta(v)/delta(t) |
| What applies to the motion of a ball rising and then falling in free fall? | The ball has constant acceleration as it moves upward, at the top of its path, and as it moves downward |
| A baseball catcher throws a ball vertically upward and catches it in the same spot as it returns to the mitt. At what point in the ball's path does it experience zero velocity and nonzero acceleration at the same time? | At the top of its path |
| A kitten pushes a ball of yarn rolling toward it at 1.00 cm/s with its nose, displacing the ball of yarn 17.5 cm in the opposite direction in 2.00 s. What equation should you use to find the acceleration of the ball of yarn? | d = 1/2at^2+vt |
| What is the support force? | The upward force opposite to gravity |
| Inertia (Newton's Laws) | Object continues in a uniform speed in a straight line |
| F = ma | Acceleration is directly proportional to net force, inversely proportional to mass |
| Action - reaction | Object exerts a force on a second object the second object exerts an equal & opposite force |
| F = ma can be derived into which formulas? | A = f/m, m = f/a |
| Inertia (Definition) | Tendency of an object to resist change |
| Equilibrium | Net force on an object is zero |
| What are the universal forces? | Electromagnetism, gravity, nuclear forces |
| Apparent weight | Weight the object experiences as a result of forces acting upon it |
| Terminal Velocity | When drag forces equal the force of gravity |
| Interaction pair | Two forces acting in opposite directions (3rd law) |
| Force | Push/pull exerted on an object |
| Normal force | If not moving, equals 0 |
| 1 lb is equal to how many Newtons? | 4.45 |
| 1 kg is equal to how many lbs? | 2.2 |
| Define displacement | Change in position |
| Distance (define) | How far an object is from the origin |
| Magnitude is also | Size |
| Vector that represents the sum of two vectors is the | Resultant |
| Quantities w/ size and direction | Vectors |
| Distance, time, temperature, i.e. those without direction are called | Scalars |
| Average velocity is the __ of a position time graph | Slope |
| Absolute value of the slope of a position time graph is the | Average speed |
| Gravity is equal to | -9.81 m/s^2 |
| Object is moving up | Velocity is negative, acceleration is -9.81 m/s^2 |
| Object is at the top of its path | Velocity equals 0, acceleration is -9.81 m/s^2 |
| Object is moving down | Velocity is increasing, acceleration is 9.81 m/s^2 |
| Given V(sub f), t, d: | a = delta(v)/t -> d = v(sub i)t + 1/2at^2 = v(sub i)t + 1/2(delta v)t = 1/2v(sub i)t + 1/2v(sub f)t |
| Hypothesis | The part of the lab where you write what you think will happen |
| Purpose | The part of the lab where you state what you are trying to learn |
| Procedure | The part of the lab where you will state the major details in a numbered format |
| Results | The location within the lab report where you will record temperatures, times, calculations, and measurements |
| Conclusion | This section answers the purpose, explains errors, states the most difficult part, and any changes you would make |
| What is the difference between speed and velocity? | Speed measures how fast one goes, but velocity measures both magnitude and direction |
| 1 micrometer equals | 10^-6 m |
| What is the number of significant digits in the measurement of 34.000 m? | 5 |
| The method of treating the units as algebraic quantities that can be cancelled is called ___ analysis | Dimensional |
| The valid digits in a measurement are called | Significant digits |
| What is the SI unit of speed? | m/s |
| Is the SI unit of speed a basic unit or a derived unit? | Derived |
| What is teh difference between 5.0 and 5.00 | 5.00 is more precise and your answer seems more confident |
| According to the scientific method, how does a physicist formulate and objectively test hypothesis? | By experiments |
| What do models assist us in doing? | Building hypotheses |
| The symbol Mm represents a | Megameter |
| The SI base unit used to measure length is the | Meter |
| The Earth to Moon distance is 385 000 km. Express this measurement in m in scientific notation | 3.85 x 10^8 m |
