Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Engineering > Unit 3 - Mechanics > Flashcards

Unit 3 - Mechanics Flashcards

1
Q

Outline Newton’s first law

A

when the resultant force is 0N, it will maintain velocity, including if it is stationary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Outline Newton’s second law

A

F=ma

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Outline Newton’s third law

A

every force has an equal and opposite reactive force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Outline the term brittle in terms of material properties

A

doesn’t plastically deform before failure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Outline the term ductile in terms of material properties

A

ability of an object to deform without breaking (usually along its length)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Outline the term tough in terms of material properties

A

ability of an object to resist failure when receiving a blow to shock

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Outline the term hard in terms of material properties

A

ability for a material to resist abrasion (scratching from the environment)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Outline the term malleable in terms of material properties

A

ability to be reshaped (deform) without failing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Outline the term stiffness in terms of material properties

A

the amount of stress applied for 1 unit of strain - Youngs modulus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Outline the term factor of safety and its equation

A

FoS = allowable stress / ultimate stress

also known as potential failure limit

FoS is the largest value of stress a material can withstand

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Outline the equation for the centre of mass away from the edge of a semi-circle

A

4r / 3pi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Outline the three types of levers and how to remember their order

A

Class 1 - Fulcrum
Class 2 - Load
Class 3 - Effort

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Outline the equation for mechanical advantage (MA) for Levers

A

load / effort
Fout / Fin
a / b
1 / VR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Outline the equation for velocity ratio (VR) for Levers

A

effort / load
Fin / Fout
b / a
1 / MA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Outline the position of A and B in any lever system

A

A is between the Fulcrum and Effort
B is between the Fulcrum and Load

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Name the 8 types of gears

A

Spur
Compound Spur
Idler
Chain and Gear
Bevel
Rack and pinion
Worm gears/wheels
Helical gears

17
Q

Outline Spur gears

A

Most common gear used
Noisy
Cheap to manufacture
Round with equally sized teeth

18
Q

Outline Compound Spur gears

A

used to alter direction and speed

gears will make the next one move in the opposite direction

small to big gears - slower
big to small gears - faster

19
Q

Outline Idler gears

A

uses spur gears with one extra gear in the middle

used to make the first and last gears move in the same direction
can be used just to fill the space

20
Q

Outline Chain and Gear system

A

two chains apart from each other, connected via a chain with teeth

used to drive a chain or pulley
gears move in the same direction

21
Q

Outline Bevel gears

A

changes the axis of the gears by 90 degrees

changes direction

22
Q

Outline Rack and pinion gears

A

pinion (spur) gear is used to move a rack

used in motor vehicles to change direction when turning wheel

23
Q

Outline worm gears/wheels

A

long rod (worm) turned to move wheel (spur)
only goes one direction as there is too much friction to go the other way
teeth are slanted
slows stuff down fast

if there are n shafts (teeth) on wheel, it take n turns of the worm for 1 turn of the wheel

24
Q

Outline Helical gears

A

double helix stops a sideways force being exerted in a single helix.

25
Q

Outline the equation for mechanical advantage (MA) in gears

A

number of teeth on output
/
number of teeth on input

1 / VR

26
Q

Outline the equation for velocity ratio (VR) in gears

A

number of teeth on input
/
number of teeth on output

1 / MA

27
Q

Outline the equation for mechanical advantage (MA) in a pulley system

A

diameter of output
/
diameter of input

1 / VR

28
Q

Outline the equation for velocity ratio (VR) in a pulley system

A

diameter of input
/
diameter of output

1 / MA

Engineering (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions