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Forces
Physical Science
Question | Answer |
---|---|
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 |