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Physics

7th grade physics

QuestionAnswer
What is force? A push or pull
What is an unbalanced force? Not equal, causes an object to move.
What is a balanced force? Equal, the same strength, an object doesn't move
What is net force? All forces acting on an object, total forces
What is Inertia/newton's first law of motion? an object in motion stays in motion , an object at rest stays at rest unless acted upon by an unbalanced force
What is newton's second law of motion? force=mass x acceleration
What is friction? A force that opposes motion when two surfaces make contact
What is gravity? The force that pulls objects towards each other
What is air resistance? The fluid friction experienced by objects falling through the air
What is momentum? The product of an object's mass and velocity
What is newtons third law of motion? for every action there is an equal and opposite reaction
What two factures ddetermine the frictional force between two surfaces? 1. The pressure pushing the objects together 2. How uneven the two surfaces of the objects are
How are mass and weight different? Mass is how much matter is in an object and weight is the force of gravity on an object
What are the four types of friction? fluid, static, rolling, and sliding
What is the law of universal gravitation? It states that any two bodies in the universe attract eachother due to their gravitational pull. This was created by Isaac Newton
what is the relationship between mass and momentum? The greater the mass, the greater the momentum.
What is the relationship between velocity and momentum? The greater the velocity, the greater the momentum.
Created by: ooomber