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Motion Review

What is velocity? Speed in a given direction.
What is speed? The measure of distance traveled per unit of time.
Explain displacement. Displacement is the change in an object’s position from it’s original location.
What is distance? How much ground an object has covered during its motion.
Explain acceleration. Tell three ways an object can accelerate. Acceleration is the change in an object's speed or velocity. An object can accelerate by: Slowing down Speeding up Or Changing direction.
Explain why deceleration is also acceleration. This is because acceleration is any change in an object’s speed or velocity and deceleration means slowing down.
What does a flat line on a distance/time graph represent? It means that the object is stopped.
Greater slope up means ____________ on a distance/time graph. Fast steady speed
Greater slope down means ____________ on a distance/time graph. A steady speed returning to the origin.
What does a flat line on a velocity/time graph represent? Steady velocity.
What does an upward slope on a velocity/time graph represent? Acceleration.
What does a downward slope on a velocity/time graph represent? Acceleration/ Deceleration
What does constant velocity mean? No change in speed or direction.
Tell three ways velocity can change. Slowing down Speeding up And Changing direction.
If an object’s mass increases, its acceleration will ______________. Decrease.
Force = _________ x ____________ Mass x Acceleration
What are unbalanced forces? Unequal forces that act on an object that cause a change in motion. Create a Net Force not equal to zero.
What are balanced forces? Equal forces that act on an object in different directions and do not cause a change in motion. No net force
Net force = _______________ The sum of all forces acting on an object.
What type of force does not cause acceleration? Equal force; Balanced force
What is magnitude? The size or extent of something.
What is vector? A quantity that has magnitude and direction.
Explain Newton’s First Law of Motion. A body in motion is most likely to stay in motion and a body at rest will stay at rest unless an unbalanced force acts on it.
Greater mass = __________ inertia Greater
Explain Newton’s Second Law of Motion. When a net force acts on an object, the object will accelerate in the direction of the force.
Explain Newton’s Third Law of Motion. For every force or action, there is an equal and opposite reaction.
What is inertia? A property of matter that causes it to resist changes in velocity.
What is another name for Newton’s First Law of Motion? The Law of Inertia.
What does air resistance depend upon? The size, shape, speed, and surface area of the object.
What is the formula for velocity? V= Distance / Time
What is the difference between speed and velocity? Speed is the amount of distance traveled per unit of time while velocity speed in a given direction.
What is the difference between mass and weight? Mass is the amount of matter in an object while weight is the effect of gravity on mass. Mass is constant.
How does your mass on Earth compare to your mass on the moon? The mass would be the same.
How does your weight on Earth compare to your weight on the moon? I would weigh less on the moon because there is less gravity.
Explain friction. How does it affect the movement of an object? Friction is resistance when an object moves across a surface.
How does the mass of an object affect the amount of force needed to accelerate the object? The greater the mass, the smaller the acceleration and the greater the net force, the faster the acceleration. This means that the larger the mass of an object is, the more force it would need to accelerate.
Explain how to solve a vector diagram (to determine a net force). If there is a box with to arrows point left that both say 5 Newtons and one that points right that says 5 N, you would add the two fives pointing left and the subtract the 5 pointing right from that answer. Ex. 5+5=10 N left 10 N - 5 N right = 5 N left.
Created by: krozwood