Brainscape's Knowledge GenomeTM

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


See full index

Science 8A > Unit D: Mechanical System > Flashcards

Unit D: Mechanical System Flashcards

Remember Everything for ze test

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What is a simple machine?

A

a tool or machine that is made up of a basic machine.

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

Name 6 simple machines? and describe them

A

Lever, Inclined Plane, Wedge, Screw, Wheel and Axle, and a Pulley

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

What is a lever?

A

A lever is a rigid bar or plank that can rotate around a fixed point called a fulcrum or pivot

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

What is an inclined plane?

A

Inclined plane or ramp can be used to carry objects to a higher height.

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

What is a wedge?

A

By putting force on a wide end, you can separate the object.

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

What is a screw?

A

A cylinder with a groove cut on the outside.

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

What is a wheel and axle?

A

2 wheels on different diameters that turn together.

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

What is a pulley?

A

A wire, rope, or cable moving on a grooved wheel.

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

What’s a first class lever?

A

Fulcrum is between load and effort

ex) Scissors

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

What’s a second class lever?

A

Load is between fulcrum and effort ex: wheelbarrow

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

What’s a third class lever?

A

Effort is between load and fulcrum. ex: shovel

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

A simple machine can obtain 4 objectives. Can you name all 4?

A

1: Change the direction of a force
2: Multiplying force
3: Increase or decrease speed
4: Transferring force

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

What is a complex machine?

A

A machine made up of several simple machines

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

What is a linkage?

A

A part of the machine that transfers energy from an energy source to the object

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

What is a transmission?

A

transfers energy from the engine to the wheels using number of different gears

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

What is a gear?

A

A wheel with teeth that interlink when rotated with another wheel.

17
Q

What is Multiplying gears?

A

A large gear that makes the smaller gear rotate faster

18
Q

What is Reducing gears?

A

A smaller gear that makes the larger gear rotate slowly

19
Q

What is the equation for Mechanical Advantage?

A

MA = force output / force input

20
Q

What is the equation for Speed Ratio?

A

SR = Input Distance / Output Distance

21
Q

What is friction?

A

A force that opposes motion

22
Q

What is the equation for Efficiency?

A

Efficiency = Mechanical Advantage (MA) / Speed Ratio (SR) x 100

23
Q

What is the equation for Work?

A

Work = Force x Distance

24
Q

What’s a hydraulic system?

A

Uses a liquid under pressure to move a load

25
Q

What’s the equation for pressure?

A

Pressure = Force / Area

26
Q

What is a piston?

A

A disk that can fit nicely into a cylinder and it can push fluids out or draws fluids into the cylinder

27
Q

What are Systems?

A

A group of parts that work to perform a specific function

28
Q

What are Subsystems?

A

A group of parts that work to together to form a specific task

29
Q

What is Pascal’s Law?

A

Pressure applied into an enclosed fluid transmitted equally in all direction throughout the fluid

30
Q

Difference between Input work and Output work?

A

Input Work is the force applied to the machine and Output Work is the force the machine applies to the object

31
Q

Mechanical advantage can best be defined as the?

A

the ratio of the force produced by a machine to the force applied to it.

32
Q

The standard unit of pressure is the Pascal (Pa) which is equal to?

A

1 N/m2

33
Q

Bones and muscles operate as what simple machine?

A

Lever

34
Q

A screwdriver is a combination of which 2 simple machines?

A

Wheel and Axle, Wedge

35
Q

When using a wheelbarrow, the load seems lightest if it is?

A

close as possible to the wheel

36
Q

One advantage that a hydraulic system has over a system of levers, gears, or pulleys, is that it?

A

has fewer moving parts and less friction

Science 8A (5 decks)

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