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Flashcards in Eng and sci Exam Study Deck (21):
1

Bevel gear and crown gear do?

Speed up and slow down, makes something change in 90 degrees

Same thing

2

Spur gear and idler gear

To spread up or slow down

To help with the direction

3

Worm gear

Makes something slow down and changes axis of rotation

4

3 types of forces

Tensile force- stretch or pull apart

Compressive- squash or push together

Shearing- top falling over bottom like twisting

5

Hooked law

Force= force constant times change in lengths

6

Mechanical advantage equation?
And example

Load/effort and an example is load distance 5cm/ effort distance 10 to have a mechanical advantage of 2

7

Metres per second is a measurement of,

Speed

8

Newtons-meters is a measure of?

Torque

9

Something that goes forward?

Up and back repetitive

Around in a circle

Up back like a wave or sea saw

Linear

Reciprocation

Rotary

Oscillation

10

When you are being stretched out?

Tension

11

Weight is a measurement of how heavy your body is measured in kilograms?

False it's your body mass

12

Try to lift 2000n but a pump only required him to use 400n in effort, what the MA?

2000/400

5 MA

13

If there is one rope in a pulley the MA EQUALS

1

14

Which gear changes rotary to linear motion??

Rack and pinion

15

Bevel gear is to change the axis of rotation but no the gear ratio

True

16

Gears that change rotary to refiprocating?

Cam gear

17

When u are spinning a handle and it has 8 teeth and the other two that it's spinning have 24?

The ratio is 3 to 1

18

Class of levers?
1: fulcrum is in middle
2: lad in middle, effort at end and fulcrum start
3: effort in middle, load and fulcrum at ends

Tru

19

Can a first class lever have a mechanical advantage of more than lne?

True

20

If it's kg and you need to convert it to newtons it has to be times by 10!

200kg times 10= 2000n
Effort= load/4
2000/4= 500n

21

Length divided by width, what is the mechanical advantage

Length of a axe 30cm and width 10cm.
The MA equals 31