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Forces

Physical Science

QuestionAnswer
What is the SI unit of force? Newtons (N)
What is inertia? The tendency of an object to resist any change in motion?
What are the three types of friction? Static, Kinetic, Rolling
What is a net force? A combination of forces
What is another name for Newton's 1st law of motion? Law of inertia
Why is a seat belt important? They slow your body down over a longer period and reduce the force of the impact.
What does mass times acceleration equal? Net force
What is the main part of Newtons 3rd law of motion? Equal action and reaction
What are three factors that affect the amount of air resistance acting on an object? Size, shape, speed
Which scientist is famous for his experiments involving falling objects? Galileo
What is the attractive force between objects in the universe? Gravity
What does gravity depend on? Mass and distance
What is weight measured in? Newtons (N)
What does it mean when you are in free fall? You are weightless because there is no gravitational pull
Created by: sam8252