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23 Cards in this Set
- Front
- Back
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Name the 3 laws of motion
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-Law of inertia
-2nd law:shows how force, mass, and accerleration are related. -3rd Law: for every action there is an equal and opposite reaction |
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What is the first law of motion?
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Law of inertia. An object at rest stays ar rest and an object in motion maintains its velocity unless acted upon by an unbalanced force.
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What is the 2nd law of motion?
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Shows how force, mass, and acceleration are related.
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What is the 3rd law of motion?
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For every action there is an equal and opposite reaction.
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Inertia
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tendency of an object at rest to stay at rest or to continue moving at a constant velocity.
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What is the formula for force?
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f=ma
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PRACTICE PROBLEMS ON FORCE
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PRACTICE
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Units for force problems
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Newtons or kg x m/s2
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What is it called when only gravity is acting on an object?
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Free fall.
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Weight
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force on an object due to gravity.
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Terminal Velocity
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When force from falling is equal to force from gravity.
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PRACTICE 3rd LAW PROBLEMS!!!
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PRACTICE
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Momentum
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Product of an objects ass and velocity.
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Formula for momentum
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p=mv
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Units for momentum
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kg x m/s
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Can momentum be transferred?
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yes. when a moving object hits another object, some or all of its momentum is transferred to the other object.
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PRACTICE MOMENTUM PROBLEMS!!
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PRACTICE
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How much inertia do small objects have?
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small mass have low inertia.
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Does acceleration occur without force?
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no
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When does free fall occur?
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when in the absence of air resistence
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Will objects of different mass with the same air resistance accelerate at the same rate and land at the same time?
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yes they will because of free fall.
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If you push on it, it will push on you
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hint
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3rd law explanations
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in every action there is a pair of forces that work in opposition of each other. In every action, the size of the force on the first object is equal to the force on the 2nd object and in the opposite direction.
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