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Motion And Forces Flashcards

1
Q

Acceleration

A

The rate at which velocity changes over time

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2
Q

Air resistance

A

The fluid friction due to air

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3
Q

Atom

A

The smallest part of the element that has the chemical properties of that element

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4
Q

Bernoulli’s principal

A

A statement that describes the effects of movement on fluid pressure. According to this principle, an increase in the speed of the motion of a fluid decreases the pressure within the fluid.

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5
Q

Buoyant force

A

The upward force on objects in a fluid; often called buoyancy.

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6
Q

Centripetal force

A

Any force that keeps an object moving in a circle.

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7
Q

Collision

A

A situation in which two objects in close contact exchange energy and momentum.

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8
Q

Compound

A

A substance made up of two or more different types of atoms bonded together.

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9
Q

Compound machine

A

A machine that is made up of two or more simple machines.

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10
Q

Cycle

A

A series of events or actions that repeat themselves regularly; a physical and/or chemical process in which one material continually changes locations and/or forms.
Examples include the water cycle, the carbon cycle, and the rock cycle.

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11
Q

Data

A

Information gathered by observation or experimentation that can be used in calculating or reasoning. Data is a plural word; the singular is datum.

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12
Q

Density

A

A property of matter representing the mass per unit volume.

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13
Q

Efficieny

A

The percentage of the input work done on a machine that the machine can return in output work. A machine’s output work divided by its input work and multiplied by
100.

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14
Q

Element

A

A substance that cannot be broken down into a simple substance by ordinary chemical changes. An element consists of consists of only one type

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15
Q

Energy

A

The ability to do work or cause a change

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16
Q

Experiement

A

An organized procedure to study something under controlled conditions

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17
Q

Fluid

A

A substance that can flow easily

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18
Q

Force

A

A push or a pull

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19
Q

Friction

A

A forge that resists the motion between two surfaces in contact

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20
Q

Gravity

A

The force that objects exert on each other because of their masses

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21
Q

Horizontal

A

Parallel to the horizon; level

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22
Q

Horse power HP

A

the unit of measurement of power for engines and motors = 745 watts

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23
Q

Hypothesis

A

A tentative explanation for an observation or phenomenon

24
Q

Inclined plane

A

A simple machine that is a sloping surface such as a ramp

25
Joule(jool)
A unit used to measure energy and work. One calorie = 4.18 joules of energy. One joule is done when a force of one newton moves an object one meter
26
Kinetic energy
The energy of motion. Moving object has the most kinetic energy to the point where it moves the fastest.
27
Law
In science, a rule or principle describing a physical relationship that always works in the same way under the same conditions
28
Law of conservation of energy
A law stating that no matter how energy is transferred or transformed all energy is still present in one form or another
29
Law of conservation of momentum
A law stating that the amount of momentum a system of objects has does not change as long as there are no outside forces
30
Lever
A solid bar that moves or rotates
31
Machine
Any device that makes doing work easier
32
Mass
A measure of how much objects are made
33
Matter
Anything that has mass and volume, as a solid, liquid, or gas
34
Mechanical advantage
The number of times a machine multiplies the input force
35
Mechanical energy
A combination of the kinetic energy and potential energy an object has
36
Meter m
The international standard unit of length about 38.37 pulgadas
37
Molecule
A group of atoms that are held together by A covalent bonds
38
Momentum
A measure of mass in motion
39
Motion
A change of position over time
40
Nanotechnology
The science and technology of building electronic circuits and devices from simple atoms
41
Net force
The overall force acting on an object when all of forces acting on it combined
42
Newton’s first law
A scientific law stating that objects at rest remain at rest and objects in motion remain in motion
43
Newton’s second law
A scientific law stating that the acceleration of an object increases with force and decreases with mass
44
Newton’s third
A scientific law stating that every time one object, the second object exerts a force that is equal in size and opposite in direction back on the first object
45
Orbit
The elliptical path one celestial body follows around another celestial body. An object in orbit has a central tripetal force acting on ur that keeps the object moving in a circle or eclipse.
46
Pascal pa
The unit used to measure pressure. One pascal is the pressure exerted by one newton of force on an area of one square meter, or one N/m?.
47
Pascals principle
A statement that says when an outside pressure is applied at any point to a fluid in a container, that pressure is transmitted throughout the fluid with equal strength.
48
Position
An object's location.
49
Potential energy
Stored energy; the energy an object has due to its position, molecular arrangement, or chemical composition
50
Power
The rate at which work is done
51
Pressure
A measure of how much force is acting on a certain area; how concentrated a force is. Pressure is equal to the force divided by the area
52
Pulley
A wheel with a grooved rim that turns on axel; one of the six simple machines
53
Reference point
A location to which another location is compare
54
Relative point
The idea that the observation of motion depends on the observer
55
Robot
A machine that works automatically or b remote control

Motion And Forces (1 decks)

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