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Filosa Science

Chapter 3 Study Guide

QuestionAnswer
Newton's First Law of Motion An object in motion stays in motion and an object at rest stays at rest unless an unbalanced force acts on it.
Newton's Second Law of Motion The acceleration of an object is in the same direction as the net force on the object.
Newton's Third Law of Motion To every action force, there is an equal and opposite reaction.
Mass How much matter is in an object
More mass = ? Harder to move or stop (inertia)
Equation to find force F=ma (force = mass x acceleration)
Friction Two surfaces which *micro-welds* oppose two objects from sliding past each other.
Sliding Friction Prevents two surfaces from sliding past each other. Ex: You push a large box, but it just won't move.
Static Friction The force that opposes two surfaces that are already sliding. Ex: One you get the box moving, it is easier to slide.
Rolling Friction As wheels roll over a surface, the wheels dig into the surface, causing both the wheels and the surface to be deformed.
Difference between mass and weight Mass is how much matter is in an object and weight is the gravitational force between two objects.
Gravity Attractive force between two objects depending on the mass and distance of the objects. Stronger than air resistance!
Air Resistance Friction-like force that affects objects that move through the air. More surface area = more air resistance Less surface area= less air resistance
Why do we weight more less on another planet? There is less gravitational force.
Terminal velocity When air resistance and gravity are equal.
Law of Conservation of Momentum Momentum can neither be created or destroyed, only transferred.
Horizontal and vertical motion When you throw a ball, force exerted by your hand pushes the ball forward. This force gives the ball horizontal motion. When you let go of the ball gravity can pull it downward. The ball has constant horizontal velocity but increasing vertical velocity.
Created by: cakarax3
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