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# Motin Review

What is velocity? Speed in a given direction.
What is speed? The measure of distance traveled per unit of time; how fast something is moving; distance divided by time.
Explain displacement. It is the change in position from an object's original direction.
What is distance? It is the amount of ground an object has covered during its motion.
Explain acceleration. Tell three ways an object can accelerate. It is the rate of change. It can change by velocity, direction, or velocity AND direction.
Explain why deceleration is also acceleration. Acceleration is just the rate of CHANGE. Whether that change is negative or not. (Deceleration is also called negative acceleration)
What does a flat line on a distance/time graph represent? It means the object is stopped.
Greater slope up means ____________ on a distance/time graph. It means the object is at a steady speed.
Greater slope down means ____________ on a distance/time graph. It means that the object is returning to a stop.
What does a flat line on a velocity/time graph represent? It means the object has a steady speed.
What does an upward slope on a velocity/time graph represent? It means the object is accelerating.
What does a downward slope on a velocity/time graph represent? It means the object is deceleration.
What does constant velocity mean? When an object is moving the same distance every second.
Tell three ways velocity can change. If an objects speed and direction do not change.
If an object’s mass increases, its acceleration will ______________. Change.
Force = _________ x ____________ Mass x Acceleration
What are unbalanced forces? Unequal forces that act on an object.
What are balanced forces? Equal forces that act on an object in opposite directions.
Net force = _______________ The sum of all forces acting on an object.
What type of force does not cause acceleration? An equal force.
What is magnitude? Another word for size.
What is vector? Another word for direction.
Explain Newton’s First Law of Motion. It says, "A body in motion is likely to stay in motion, and a body at rest will stay at rest." This means that if something is moving it will keep moving and something not moving will not move.
Greater mass = __________ inertia Greater.
Explain Newton’s Second Law of Motion. It says, "When a net force acts on an object, the object will accelerate in the direction of this net force." This means that an object will move whatever way the net force makes it.
Explain Newton’s Third Law of Motion. It says, "For every force or action, there is an equal and opposite reaction." This means that every time something is moving, there is an opposite reaction as well.
What is inertia? The tendency to resist change.
What is another name for Newton’s First Law of Motion? The Law of Inertia.
What does air resistance depend upon? Size, shape, speed, and surface area of the falling object.
What is the formula for velocity? Distance/time
What is the difference between speed and velocity? Speed is the measure of distance traveled and velocity is speed in a given direction.
What is the difference between mass and weight? Mass is the amount of matter inside of an object and weight is the amount of force gravity is putting on an object.
How does your mass on Earth compare to your mass on the moon? They are the same because mass is the amount of matter inside of an object.
How does your weight on Earth compare to your weight on the moon? Your weight on Earth will be greater than the Moon because the Moon has no gravity.
Explain friction. How does it affect the movement of an object? Friction is caused when two objects are rubbed together. It slows an object down.
How does the mass of an object affect the amount of force needed to accelerate the object? The more mass an object has, the more force is needed to make the object accelerate.
Explain how to solve a vector diagram (to determine a net force). You have to add all of the forces together as vectors. This will tell you the final net force.
Created by: MikaelaL