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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

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.___

______-how far an object moves during a certain amount of time.


average speed;

Average speed = distance/time

Motion is always measured in relation with some location called a _____.

point of reference

_____ 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.

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

_______-the energy used when a force moves an object. It is only done when an object ______.

work, moves

_____-the rate at which work is done The faster the work, the ______ the _____.

power, greater , power

_______-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

________-a force that pushes and pulls other objects. Ex: The North pole of a magnet will attract the ____ of another magnet.

magnetism, South pole

______-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

____ and ____ can push or pull objects

Magnetism and electricity

______-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

_________-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

________-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

_______-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

_______-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

______-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

______-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

_______-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

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