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Physical Scienc 3rd
Ps 3rd Nine Weeks Exam Review
| Question | Answer |
|---|---|
| The change in an object's position relative to a reference point is called. | motion |
| A measurement with a number and a unit is a | scalar quantity |
| A measurement with a number, unit , and direction is a | vector quantity |
| Distance traveled is which: scalar or vector? | scalar |
| How fast an object travels is called | speed or velocity |
| The equation for speed/velocity is | v=d/t (velocity= distance/time) |
| Time is the independent variable (the one that is changed by the experimenter) and goes on the | x-axis |
| Distance is the dependent variable (the one that changes as a result of the experiment)and goes on the | y-axis |
| The steepness or tilt of the line is called the | slope |
| Slope = | rise/run |
| The slope of a distance-time graph is the ______of the object | velocity |
| The slope of the line is | acceleration |
| The area under the line is the_______ traveled | distance |
| When and object is dropped and falls through the air, the motion is in the______direction | Vertical |
| When an object is dropped,______ is applying a net downward force on the object | gravity |
| The rate at which the object acceleration is called the | acceleration due to gravity |
| If you dropped a ball vertically and threw a ball horizontally, which one would hit the floor first? | same time |
| A push or pull is a | force |
| What is the unit for Force? | Newton(N) |
| When two or more forces act on an object at the same time, the forces combine to form a ___force. | net |
| The gravitational force exerted on an object is the objects _____ | weight |
| A measure of the amount of matter an object has is called | mass |
| Which of Newtons law of Motion states that an object at rest wants to stay at rest and an object in motion wants to continue in motion | 1st law |
| The tendency of an object to resist a change in motion (Newtons first law) is called | Inertia |
| Which of Newtons law of motion state that a net force will accelerate a mass? | 2nd law |
| What is the equation for Newtons Second Law of Motion | F=m*a (N) |
| Which of newtons laws of motion state that for every action there is an equal and opposite reaction | 3rd law |
| The product of the mass and the velocity of an object is called the | momentum |
| Momentum is moving | Inertia |
| The symbol for momentum | (P) |
| The equation for momentum | P=m*v |
| Unit for momentum | Kg=m/s |
| Is momentum a vector or scalar quantity? | vector |
| A force applied to an object for a certain time period is called an | impulse |
| Symbol for impulse | I |
| What is the equation for impulse | I=F*t |
| What is the unit for impulse | Ns, Kgm/s |
| During a collision, is momentum conserved? | Yes |
| Using a force to move an object a certain distance is called | work |
| work's equation | w=F*d |
| Is work a vector or scalar | vector |
| If the object does not move, has any work been performed? | No |
| As distance goes up, the force required to do the same amount of work goes_______ | down |
| What can be used to make work easier | simple machine |
| The force that is applied to the simple machine is called the | Effort |
| any sloping surface that is used to make work easier is an | inclined plane |
| 2 inclined plane back to back is a_____ | wedge |
| an inclined plane wrapped around a rod in a spiral is a_______ | Screw |
| A bar that is supported at one place while a force applied at another place is a | lever |
| A grooved wheel a rope that can increase force, change the direction of the force, or both is a | pulley |
| a combination of two different sized wheels that rotate together is a | Wheel and axle |
| One way to measure how much easier a machine makes the work by calculating the _________ of the machine. | efficiency |
| You can______get more work out of a machine that you put into it. | never |
| efficiency equation | efficiency=(workout/workin)x100% |
| Another way to measure the effectiveness of a machine is to see how much the machine________the force needed. | increases |
| The ratio of the output (resistance) force to the imput (effort) force is called the | actual mechanical advantage |
| The ration of the effort distance to the resistance distance is called the | Ideal mechanical advantage |
| Mechanical advantage is a________ and does not have units. | ratio |
| The ability to do work is called | energy |
| Energy in motion is called_______energy | Kinetic |
| Stored energy is called_______energy | potential |
| Potential energy due to an objects location is called_________potential energy. | gravitational |
| what is the equation for gravitational potential energy | mgh (mass, gravity, height) |
| The kinetic energy of atomic motion ( the motion of atoms) is called_______energy | thermal |
| Moving thermal energy is called | Heat |
| The study of the relationships of work, heat, and energy is called | thermodynamics |
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