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21 Cards in this Set
- Front
- Back
Motion is ______. Motion happens at different _____, or ______. You cannot always _____ motion. |
movement, rates, speeds, see |
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There are different kinds of motion (5): 1. _____-always moving, always steady. Ex: _____ 2. _____-movement in different directions at different speeds. Ex.: _______ 3. _______- This motion vibrates or moves very quickly back and forth in one place. Ex.:______ 4. _______-motion that moves back and forth. Ex.: _______ 5. ______- moves in a circular motion. Ex.:_____ |
1. Constant; Earth has a constant motion as it moves around the Sun. 2. Variable; A car can move in different directions and at different speeds. 3. Vibrational; A guitar string vibrates when you play it, a rubber band vibrates when you pluck it. 4. Periodic; A pendulum swings back and forth. 5. Circular; Wheels move in a circular motion.___ |
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______-how far an object moves during a certain amount of time. Formula: |
average speed; Average speed = distance/time |
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Motion is always measured in relation with some location called a _____. |
point of reference |
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_____ describes the speed and direction of an object's motion. Ex: |
Velocity; The speed of a train may be 30 meters per second. The velocity may be 30 meters per second north. |
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A ______ is a push or pull that acts on an object. Forces can move objects. A _______ can make an object _____ , _____ or ______. |
force, force, speed up, slow down, change direction |
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_______-the energy used when a force moves an object. It is only done when an object ______. |
work, moves |
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_____-the rate at which work is done The faster the work, the ______ the _____. |
power, greater , power |
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_______-every object has a gravitational force on every other object. Only ______ objects have a _____ pull you can feel. Earth's _____ pulls objects toward its ______. ______ can _____ objects. |
gravity, large, gravitational, gravity, center, gravity, pull |
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________-a force that pushes and pulls other objects. Ex: The North pole of a magnet will attract the ____ of another magnet. |
magnetism, South pole |
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______-push and pull between objects with electrical charges. An object with a ____ charge is attracted to an object with a ____ charge. _____ act between objects that are ____ charged. |
electric forces, negative, positive, Electric forces, electrically |
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____ and ____ can push or pull objects |
Magnetism and electricity |
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______-the force that results when two materials rub against each other. _____ _____down the motion of an object or keep it from _______. Example: Using the ______ on a bicycle. |
friction, friction slows, moving, hand brakes |
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_________-all force (such as ____ and ______ acting on an object. The ____ will determine if the object will start ______, stop ____, or change _______. |
net force, gravity, friction, net force, moving, moving, direction |
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________-a state when all forces acting on an object balance each other. A stationary object with this will remain ______.A moving object with this will continue to move at the same _____ in a ______ ______. |
equilibrium, stationary, speed, straight line |
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_______-An object at rest stays at rest and an object that is in motion will continue to stay in motion until a outside force acts upon it. Example-______ can activity. The washer did not ____ until and outside force acted upon it. |
Newton's 1st Law of Motion,inertia,move |
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_______-the tendency of an object to resist any change in motion. Objects with greater mass have greater _____ than objects with lesser mass. Ex: Two marbles roll down a ramp. One marble is twice as big as the other The larger marble has more _____, so greater _____ would be needed to stop its motion. |
Inertia, inertia, inertia, force |
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______-The greater the mass of an object, the greater the force is needed to move (accelerate) it. The net force equals the __________. (Formula: ________). |
Newton's 2nd Law of Motion, mass of the object times its acceleration, F=ma |
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______-the rate at which the velocity of an object changes over time. This law helps predict how things will ____. If you move a heavy box and a light box using the same force, the light box will move _____. |
acceleration, move, faster |
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_______-for every action there is an equal and opposite reaction. When one object exerts a force on a second object, the second object exerts a force on the _____ object. Ex: When you hit a baseball with a bat, the baseball moves away. The bat ____ down because it came in contact with the ball (opposite force). |
Newton's 3rd Law of Motion first, slows |
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Example of Newton's Laws of Motion using a satellite (A satellite orbiting Earth is knocked out of orbit by a meteor): 1st law-the satellite stayed in motion initially because an object in motion ____ ____ _____. 2nd Law- the force of the meteor caused a change in the ______of the satellite. 3rd Law-the force of the meteor hitting the satellite is ____ and _____ of the force of the satellite hitting the meteor. |
stays in motion motion equal,opposite |