Middle School Science

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equal forces acting in opposite directions balanced forces
occurs when an object's velocity decreases negative acceleration
sum of all forces acting on an object net force
total distance divided by total time average speed
name for the slant of a line on a graph slope
distance divided by time speed
a push or pull exerted on a body or object force
distance and direction of an object from its starting point displacement
tendency to resist change in motion Inertia
measure of how far and object has moved distance
speed and direction of motion velocity
rate of change of position at a specific point in time Instantaneous speed
the rate of change in velocity acceleration
compare and contrast: distance and displacement both are links; displacement is direction and distance; distance is how far you have moved
compare and contrast: speed and velocity both meters per second: speed is distance and velocity is speed and direction
explain the difference between positive and negative acceleration positive is speeding up negative is slowing down
how are force and motion related?­- both take unbalanced force to cause motion
what property of matter is inertia related to? mass
a car travels west for 240 kilometers in 4 hours. What is the car's velocity? 60 kilometers per hour west
an object goes from a speed of 9 m/s to a total stop in 3 sec.what is the object's velocity? -3
explain what causes an unrestrained passenger in a car to fly forward when the car stops suddenly inertia
the amount of matter in an object mass
the net force acting on an object is zero blanced forces
the speed of an object and the direction of its motion velocity
the sum of all the forces acting on an object net force
rate of change of the velocity of an object acceleration
a measure of how far an object has moved distance
the rate of change in position at a given point in time instantaneous speed
the distance and direction an object moves from its starting point displacement
the total distance an object travels divided by the time of travel average speed
the rate of change of an object's position speed
unequal forces pushing in opposite direction unbalanced forces
any change over time rate
an object that is neither speeding up or slowing down travels at a________. constant speed
a graph with distance on a vertical axis and time on a horizontal axis distance-time graph
when an object is accelerating, its speed is_______. changing
state newton's first law an object at rest will remain at rest until an unbalanced force acts on it
if the net force acting on a body is zero, will the velocity be zero? no the velocity is constant, the object will not change its motion
will all forces cause an object to accelerate? no only an unbalenced force
another name for newton's first law of motion inertia
an object slowing down has a_______ acceleration negative
the velocity of an object must have both a______ and a _________ speed; direction
the equation s=d/t is used to calculate the_____ of an object speed
in terms of positive, negative, and zero exceleration, how would you describe the motion of a student moving in a cafeteria lunch line stand still- zero forward- positive backwards- negative
explain why the second hands of a clock cannot travels at constant velocities they are changing direction
can the velocity of a car change when it's acceleration is constant? explain why or why not yes the direction is always changing
a car approaching a red traffic light has a_________ acceleration; when the light turns green, the car's acceleration is ____ negative; positive
in the equation s=d/t, d stands for______ distance
in the equation used to calculate acceleration, Vi stands for _______ and Vf stands for______ initial;final
if the acceleration of a skateboarder is ___, the sakteboarder may be soon coming to a stop negative
a net __ is necessary for an object to chanege its motion unbalanced
a freight train has more__ than a care, so it has great inertia mass
if two people push on an object beween them with equal force but in opposing directions, the net force is __? zero