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Motion Review

QuestionAnswer
What is velocity? speed in a given direction
What is speed? the measure of distance traveled per unit of time; how fast something is going; distance/time
Explain displacement. the change in position from an object's original location
What is distance? the amount of ground an object has covered during its motion
Explain acceleration. Tell three ways an object can accelerate. change in velocity, change in direction, or a in velocity and direction
Explain why deceleration is also acceleration. Acceleration is the rate of change in a object's velocity or speed.
What does a flat line on a distance/time graph represent? stopped (time passes, but distance does not change)
Greater slope up means ____________ on a distance/time graph. constant speed away from starting position
Greater slope down means ____________ on a distance/time graph. constant speed back toward starting position
What does a flat line on a velocity/time graph represent? constant speed
What does an upward slope on a velocity/time graph represent? acceleration away from starting position
What does a downward slope on a velocity/time graph represent? slowing down, away from starting position
What does constant velocity mean? an object's speed and direction does not change
Tell three ways velocity can change. change in speed, change in direction, and change in speed and 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. Forces are not equal in motion and/or direction. Cause a change in motion in motion. Net force not equal to zero.
What are balanced forces? equal forces that act on an object in opposite direction. Do not cause a change in motion. Net force of zero
Net force = _______________ the sum of all force acting on an object
What type of force does not cause acceleration? Balanced Force
What is magnitude? size
What is vector? direction
Explain Newton’s First Law of Motion. A body at rest will remain at rest, and a body in motion will remain in motion unless it is acted upon by an unbalanced force.
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 this net force
Explain Newton’s Third Law of Motion. for every force or action there is a equal and opposite reaction
What is inertia? motion will stay constant.
What is another name for Newton’s First Law of Motion? law of inertia
What does air resistance depend upon? the speed of the object and its surface area
What is the formula for velocity? distance/time
What is the difference between speed and velocity? velocity is speed and direction
What is the difference between mass and weight? mass is constant, weight is the effect of gravity
How does your mass on Earth compare to your mass on the moon? Mass remains the same
How does your weight on Earth compare to your weight on the moon? The pull of gravity is stronger on Earth than on the moon. So your weight would be heavier on Earth
Explain friction. How does it affect the movement of an object? resistance that one surface or object encounters when moving over another. It creates resistance, making the object slow down
How does the mass of an object affect the amount of force needed to accelerate the object? greater mass = greater force
Explain how to solve a vector diagram (to determine a net force). Find the sum of both forces. (Subtract)
Created by: Khailand