Mechanical

Question 1

Displacement

Answer 1

final position - initial position

Question 2

Velocity

Answer 2

average velocity = (displacement / change in time)

Question 3

Speed

Answer 3

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

Question 4

Acceleration

Answer 4

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

Question 5

Projectile Motion

Answer 5

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

Question 6

Rotational Kinematics

Answer 6

increasing the radius increases the linear speed

linear speed = radius (in radians) x rotational speed

Question 7

Force

Answer 7

a push or pull on an object

force = mass x acceleration

Question 8

Weight

Answer 8

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

Question 9

Rotational Kinetics

Answer 9

torque = radius x force

Question 10

Work

Answer 10

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)

Question 11

Energy

Answer 11

the ability of a body to do work on another object

Question 12

Kinetic Energy

Answer 12

energy an object has by virtue of its motion

Question 13

Gravitational Potential Energy

Answer 13

energy by virtue of an object’s height

gravitational potential energy = weight x height

Question 14

Elastic Potential Energy

Answer 14

energy stored in compression or tension

Question 15

Power

Answer 15

the rate of work

power = (work / time)

Question 16

Mechanical Advantage

Answer 16

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

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

Question 17

Inclined Plane

Answer 17

mechanical advantage = (slant rise / rise)

Question 18

Wedge

Answer 18

mechanical advantage = (length / width)

Question 19

Screw

Answer 19

mechanical advantage = (circumference / length between crests)

Question 20

Lever

Answer 20

mechanical advantage = (effort distance / resistance distance)

Question 21

Wheel

Answer 21

mechanical advantage = (wheel radius / axle radius)

Question 22

Gears

Answer 22

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

Question 23

Gear Ratio

Answer 23

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

Question 24

Hydraulic Jack

Answer 24

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

Question 25

Linear Momentum

Answer 25

how much a body will resist stopping momentum = (mass x velocity)

Question 26

Volumetric Flow Rate

Answer 26

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

Question 27

Density

Answer 27

how much mass is in a specific volume of a substance density = p = (mass / volume)

Question 28

Pressure

Answer 28

the amount of force applied per area pressure = (force / area)

Question 29

Pascal's Principle

Answer 29

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

Question 30

Conduction

Answer 30

the transfer of heat by physical contact

Question 31

Convection

Answer 31

the transfer of heat by the movement of fluids

Question 32

Radiation

Answer 32

the transfer of heat by electromagnetic waves

Question 33

Concave Lenses

Answer 33

make objects appear smaller

Question 34

Convex Lenses

Answer 34

make objects appear larger

Question 35

Current

Answer 35

the rate at which the charge flows through a conductive material measured in Amperes (A)

Question 36

Voltage

Answer 36

the push behind electrical work measured in volts (V)

Question 37

Resistance

Answer 37

the amount of pressure to slow electrical current measured in Ohms (OMEGA)

Question 38

Basic Circuit

Answer 38

a circuit is a closed loop through which current can flow

Question 39

Ohm's Law

Answer 39

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

Question 40

Series Circuits

Answer 40

a circuit with two or more resistors on the same path. R = (Rsub1 + Rsub2)

Question 41

Parallel Circuits

Answer 41

a circuit with two or more resistors on different, parallel paths. R = (1 / (1 / Rsub1) + (1 / Rsub2))

Question 42

Electrical Power

Answer 42

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

Question 43

Capacitors

Answer 43

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

Question 44

Inductors

Answer 44

electrical components which effectively store current inductors don't stop DC circuits, but they do resist AC circuits as AC circuits utilize changing currents

Question 45

Diodes

Answer 45

electrical components which limit the flow of electricity to one direction