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Physics Final

err'thang

QuestionAnswer
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