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Flashcards in Mechanical Deck (45):
1

Displacement

final position - initial position

2

Velocity

average velocity = (displacement / change in time)

3

Speed

average speed = (total distance travelled / change in time)

4

Acceleration

average acceleration = (change in velocity / change in time)

5

Projectile Motion

vertical velocity = (original vertical velocity - (g x time))

6

Rotational Kinematics

increasing the radius increases the linear speed

linear speed = radius (in radians) x rotational speed

7

Force

a push or pull on an object

force = mass x acceleration

8

Weight

weight = mass x acceleration due to gravity (-9.8 m/s^2 or -32.2 ft/s^2)

9

Rotational Kinetics

torque = radius x force

10

Work

the transfer of energy from one object to another

work = force x displacement

(for 2-dimensions) work = force x displacement x cos(angle between displacement and force)

11

Energy

the ability of a body to do work on another object

12

Kinetic Energy

energy an object has by virtue of its motion

13

Gravitational Potential Energy

energy by virtue of an object's height

gravitational potential energy = weight x height

14

Elastic Potential Energy

energy stored in compression or tension

15

Power

the rate of work

power = (work / time)

16

Mechanical Advantage

the amount of change a simple machine provides to the magnitude of a force

mechanical advantage = (output force / input force) = (input distance / output distance)

17

Inclined Plane

mechanical advantage = (slant rise / rise)

18

Wedge

mechanical advantage = (length / width)

19

Screw

mechanical advantage = (circumference / length between crests)

20

Lever

mechanical advantage = (effort distance / resistance distance)

21

Wheel

mechanical advantage = (wheel radius / axle radius)

22

Gears

mechanical advantage = (output torque / input torque) = (output # of teeth / input # of teeth)

23

Gear Ratio

gear ratio = (driving # of teeth / driven # of teeth)

24

Hydraulic Jack

mechanical advantage = (output radius^2 / input radius^2)

25

Linear Momentum

how much a body will resist stopping

momentum = (mass x velocity)

26

Volumetric Flow Rate

volumetric flow rate = (volume moved / time for the movement)

27

Density

how much mass is in a specific volume of a substance

density = p = (mass / volume)

28

Pressure

the amount of force applied per area

pressure = (force / area)

29

Pascal's Principle

a change in the pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid as well as to the walls of the containing vessel

30

Conduction

the transfer of heat by physical contact

31

Convection

the transfer of heat by the movement of fluids

32

Radiation

the transfer of heat by electromagnetic waves

33

Concave Lenses

make objects appear smaller

34

Convex Lenses

make objects appear larger

35

Current

the rate at which the charge flows through a conductive material

measured in Amperes (A)

36

Voltage

the push behind electrical work

measured in volts (V)

37

Resistance

the amount of pressure to slow electrical current

measured in Ohms (OMEGA)

38

Basic Circuit

a circuit is a closed loop through which current can flow

39

Ohm's Law

voltage (V) = current (I) x resistance (R)

40

Series Circuits

a circuit with two or more resistors on the same path.

R = (Rsub1 + Rsub2)

41

Parallel Circuits

a circuit with two or more resistors on different, parallel paths.

R = (1 / (1 / Rsub1) + (1 / Rsub2))

42

Electrical Power

power (P) = current (I) x voltage (V)

43

Capacitors

electrical components which store voltage

capacitors don't stop AC circuits (although they do affect the current flow), but they do stop DC circuits, acting as open circuits

44

Inductors

electrical components which effectively store current

inductors don't stop DC circuits, but they do resist AC circuits as AC circuits utilize changing currents

45

Diodes

electrical components which limit the flow of electricity to one direction