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25 Cards in this Set
- Front
- Back
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Which of Newton's laws states that an object resists change in motion unless acted upon by an external force?
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NEWTON'S FIRST LAW OF MOTION
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Which of Newton's laws addresses the attraction between two objects as a result of mass and distance?
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NEWTON'S LAW OF UNIVERSAL GRAVITATION
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Which of Newton's laws states the for every action force there is a reaction force that is equal and opposite?
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NEWTON'S THIRD LAW OF MOTION
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Which of Newton's laws addresses single objects in motion?
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FIRST AND SECOND LAWS OF MOTION
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Do action-reaction forces act on the same or separate objects?
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SEPARATE OBJECTS
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Describe the strength and direction of action-reaction forces.
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EQUAL STRENGTHS and OPPOSITE DIRECTIONS
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If you throw a ball, what is the action force?
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THE PUSH OF YOUR HAND ON THE BALL.
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If you throw a ball, what is the reaction force?
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THE PUSH OF THE BALL ON YOUR HAND.
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Why don't action-reaction forces always cancel each other out?
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THEY ACT ON DIFFERENT OBJECTS
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The backward acceleration from a reaction force is called
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RECOIL
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What two factors affect recoil?
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SPEED and MASS
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The mass of an object multiplied by its speed (or velocity) is called
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MOMENTUM.
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The equation for momentum is
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p = mv
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The symbol for momentum is
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p
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The symbol for mass is
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m
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The symbol for velocity is
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v
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The unit for velocity is
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m/s
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The unit for mass is
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kg
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The unit for momentum is
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kg.m/s
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Can the unit for momentum be written as a Newton?
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NO - a Newton has seconds squared in the denominator
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What law states that as long as interacting objects are not influenced by outside forces, the total momentum cannot change?
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LAW OF CONSERVATION OF MOMENTUM
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In regards to momentum, positive and negative refers to
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DIRECTION (+ is opposite to -)
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A shuttle resting on the launch pad, unable to move with out thruster engines on is an example of which of Newton's laws?
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FIRST LAW OF MOTION
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Which of Newton's laws is shown by a jet moving forward because the engine pushes the exhaust out backward?
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THIRD LAW OF MOTION
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Which law is shown by the fact that a greater force is needed to make a greater mass accelerate?
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SECOND LAW OF MOTION
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