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Physics Final
err'thang
| Question | Answer |
|---|---|
| scientists test their hypothesis in which step of the scientific process | experimenting |
| in which units would the length of a river most likely be measured | kilometers |
| the amount of liquid in a drinking glass would most likely be measured in which units | milliliters |
| mass is the _____ of an object | weight |
| how do you find the mass of water using a balance? | find the mass of an empty beaker, pour in the water, find the new mass, subtract the mass of the empty beaker |
| in which unit is mass measured? | grams |
| a _____ is about the mass of a dime | gram |
| in degrees Celsius, water freezes at | 37 degrees Celsius |
| a graduated cylinder is used to measure | volume |
| most common frame of reference | earth |
| to calculate velocity, you need to know | distance and direction |
| rate of change in velocity is called | average velocity |
| acceleration= | velocity/time |
| when deceleration occurs, velocity | decreases |
| force can cause objects to | start/stop moving change direction |
| the direction of the frictional force on a moving object is opposite to... | the motion of the moving object |
| a book resting on a desk is a _____ force | balanced |
| when a car moves at a constant velocity the engines force is _______ the frictional force | equal to |
| balanced forces cause | no change in motion |
| if there is an unbalanced force in an arm-wrestling match, | both arms will move in the direction of the larger force. |
| one newton= | kg-m/s^2 |
| amount off matter in an object | mass |
| curved surface of liquid in a graduated cylinder | miniscus |
| motion of car moving from a speed of 10m/s to 30m/s | acceleration |
| a push or pull | force |
| acceleration due to gravity (earth) | 9.8m/s |
| forces that are equal in size and opposite in direction | balanced |
| laws of motion were discovered by scientist | Isaac Newton |
| Newton's law of universal gravitation states that all objects in the universe attract each other by the force of | gravity |
| true/false: balanced forces are always equal and in the same direction | false |
| true/false: weight is measured in units called newtons | true |
| true/false: forces that are equal in size but opposite in direction are unbalanced forces | false |
| true/false: when an object falls, it is reacting to the force of gravity | true |
| true/false: jane is on a merry-go-round that is moving at a constant speed. her velocity is also constant | false |
| any change over time | rate |
| the rate of change of speed and/or direction | acceleration |
| if you want to calculate the acceleration of a car, you should _____ the change in velocity of the car by the time interval | divide |
| Newton's first law of motion states that an object stays at rest unless a ____ acts on it | strong force |
| size of gravitational force between two objects depends on their | masses and distance between them |
| the variable plotted on the horizontal or x-axis of a graph is called the | independent variable |
| unit of weight | Newtons |
| unit of mass | grams |
| unit of acceleration | m/s^2 |
| unit of average speed | m/s |
| why is your weight less on the moon than on earth, but your mass is the same? | there is less gravitational force on the moon than on earth. mass=matter. weight=force |
Created by:
mgorcz
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