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Tecnologia 3rd ESO > Lesson 1. Force, work and machines > Flashcards

Lesson 1. Force, work and machines Flashcards

1
Q

What is a machine?

A

Is a device that makes our work easier

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2
Q

What is a simple machine?

A

Is a machine that has no movable parts

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3
Q

What is force?

A

Is an influence that can push and pull things, change the direction of objects and can stop things

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4
Q

What is work?

A

Is when making a force we can move objects

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5
Q

Translate into English: FALCA

A

Wedge

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6
Q

Translate into English: POLITJA

A

Pulley

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7
Q

Translate into English: PLA INCLINAT

A

Inclined Plane

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8
Q

Translate into English: CARGOL

A

Screw

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9
Q

Translate into English: RODA

A

Wheel

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10
Q

Translate into English: PALANCA

A

Lever

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11
Q

Which is the unit of mesurement of lenght?

A

Meter

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12
Q

Which is the unit of mesurement of force?

A

Newton

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13
Q

Which is the unit of mesurement of time?

A

seconds

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14
Q

Which is the unit of mesurement of mass?

A

kilogram

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15
Q

What is Energy?

A

Energy is the ability to do work

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16
Q

What is the Mechanical Advantage?

A

Is the factor by which a machine multiplies the force applied to it

17
Q

What is the mass of an object?

A

Is the quantity of materia this object has

18
Q

What is the weight of an object?

A

Is the force made by Earth to attract things.

19
Q

Which are the two basic simple machines?

A

The inclined plane and the lever

20
Q

What devices are variant of the inclined plane?

A

The screw and the wedge

21
Q

What devices are variants of the lever?

A

The pulley and the wheel

22
Q

Which is the conservation energy principle?

A

Energy can neither be created nor destroyed

23
Q

We can know the weight of a mass…

A

Using Newton’s Second Law

24
Q

What is an ideal machine?

A

Theoretical machine in which there is no loss of energy

25
Q

What is an actual machine?

A

Machine in which there is loss of energy

26
Q

What is friction?

A

Is a force that makes the relative motion between two objects more difficult

27
Q

What is efficiency?

A

Is the ratio of energy used by a machine to the useful work the machine has done

28
Q

Which is the formula used to calculate Mechanical Advantage

A

MA= Output Force / Input Force

Tecnologia 3rd ESO (1 decks)

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