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95 Cards in this Set
- Front
- Back
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What is velocity?
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Describes the speed and the direction of any object's motion.
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What is force?
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A push or pull that acts on an object.
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What is a joule?
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Is the amount of work done when a force of 1 newton moves an object a distance of one meter.
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What is periodic motion?
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Swinging back and forth.
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What is average speed?
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Describes how far an object moves during a certain amount of time. to calculate speed=distance (D) time
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What is magnitude?
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How strong the force is.
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What is direction?
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Described by telling which way the force is acting.
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What is gravitational force?
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An objects weight.
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What is work?
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Energy used when a force moves on an object.
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What are electric forces?
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Electric Forces Act between objects that are electrically charged.
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What is friction?
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The force that results when two materials are rubbed against each other.
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What is air friction?
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A force that is present when air flows over a surface.
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What is power?
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The rate at which work is done.
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What is net force?
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determines whether the object will start moving, stop moving, or change direction.
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What is balanced forces?
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Equal forces act on an object in opposite directions.
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What is equilibrium?
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When all the forces acting on an object balance each other.
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What is unbalanced forces?
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forces acting in one direction are greater than the others.
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What math problem do you do to figure out speed?
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Distance (d) time.
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How do you calculate average time?
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Total time (d) number of times the experiment was done.
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How do you calculate average speed for 1,2, or 3 meters?
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Add trials, then divide by 1, 2 or three.
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What is circular motion?
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When an object moves in a circle.
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What is vibrational motion?
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When an object moves back and forth very quickly.
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What is a point of reference?
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The beginning point.
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What is a magnetic force?
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A force that pushes and pulls on other objects.
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The earth moves at a ______________.
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Constant motion
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Cars,trucks, and buses move in a ___________ motion.
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Variable
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A ____________ has a periodic motion.
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Pendulum
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Wheels move in a ________ ________.
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circular motion.
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Rubber bands have _________ ___________.
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Vibrational motion
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Speed is how ____ an object can travel in a _________ amount of time.
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Far certain
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Speed equals _________ Divided by ______
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distance divided by time
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Motion is in relationship to a _____ ___ __________
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Point of reference
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Speed and volocity are ____ the ______
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NOT same
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Volocity is the _____ and ________ of an object.
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Speed and direction
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What were two forces in the What Goes Up Lab? What was the direction of the force?
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Force of my breath and gravity.
up and down |
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What ways can you go against gravity?
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Going in space or jumping.
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What is the point of reference?
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A location you start from. (the starting point)
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Which surface had the most force and the most work? Why?
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Rubber because it had a pull going the other way. It had the most work because you had to pull harder.
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Is rolling friction more or less than sliding friction? Why?
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Rolling friction because rolling is faster that sliding.
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How do you calculate work?
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Force x Distance.
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What is a Force?
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A push or Pull
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What can a force do?
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start, stop or change direction and push or pull.
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What is magnitute?
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The strength of a force
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Gravitational forces exists between?
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All Objects
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What gravitational pulls can you feel?
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The Earth
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Where does gravity pull you towards?
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The center of the Earth
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Weight is the amount of __________ on an object
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Gravity
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What does gravity depend on?
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Mass and distance from earth
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Magnetism is a force that can______ or ______.
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push or pull
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Where is the magnetic force the greatest on a magnet?
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on its poles.
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magnets have what 2 poles?
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north and south
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opposite poles?
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attract
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What do Similar Poles do?
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repel
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What kind of force occurs between two objects?
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electrical forces and magnetic forces
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Like charges?
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repel
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opposite charges do what?
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attract
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A _____ is a push or pull.
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Force
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Forces can make an object start moving, ______ _______, or _______ _________.
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stop moving, change direction
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_______________ is the strength of the force.
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Magnitude
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the direction of the force is the way the force is ________.
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acting
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you can only feel the Earths ___________ ____.
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gravitational pull.
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Gravity pulls objects ________ the center of the Earth.
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towards
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________ is the amount of gravition on an object.
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weight
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gravity depends on ____ and ________ from Earth
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mass and distance
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magnitisum is a force that can _____ or _____.
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push or pull
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Magnetic force is strongest on magnets ______.
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poles
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Magnets have a _____ and _____ ____.
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North South pole
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_______ poles atract.
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opposite
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opposite poles ______.
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attract
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Electric forces occur between _________ charged objects.
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electrically
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Newton's First Law
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Objects that are at rest stay at rest and an object that is in motion will stay in motion.
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Inertia
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An object that resists any change in motion
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Newton's Second Law of Motion
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how acceleration, mass and net force are related.
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What is the rate at which velocity of an object changes over time?
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Acceleration
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Newton's Third Law of Motion
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Action/reaction law.
Example: Air Boat or Bumper Cars. |
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Action/Reaction Forces are_________________
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Always equal and opposite and they always occur in pairs.
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Objects are electrically charged when they ____ or ____ _______.
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Gain or lose electrons
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Electrons move when________ _____________.
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objects are rubbed together.
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Magnetic and electrical forces don't need to______ ___ _____
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touch to work.
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What increases when objects are closer together?
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magnetic, electrical and gravitational forces.
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Which two forces can be blocked
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Magnetic and electrical.
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Which force can not be blocked?
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Gravity
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Which force can only pull?
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Gravity
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Which two forces can push or pull?
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Magnetic and electrical forces.
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What is the name of the force when two objects are rubbed together?
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Friction
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What does friction do to movement?
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It slows down or keeps it from starting.
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What three thing does friction depend on?
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Shape, speed and texture.
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True or false-Air and water have friction too?
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TRUE!
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What is air friction?
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Air flowing over a surface.
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Work is done when____________?
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A force moves an object.
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Work is equal to ___________?
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Force times Distance.
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How is work measured?
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In Joules (Which is one Newton per meter)
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What is the rate that work is done?
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Power
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True or false? Power is work divided by time?
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TRUE.
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How do we measure a unit of power?
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Power is measured in watts.
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