Lesson 1. Force, work and machines

Question 1

What is a machine?

Answer 1

Is a device that makes our work easier

Question 2

What is a simple machine?

Answer 2

Is a machine that has no movable parts

Question 3

What is force?

Answer 3

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

Question 4

What is work?

Answer 4

Is when making a force we can move objects

Question 5

Translate into English: FALCA

Answer 5

Wedge

Question 6

Translate into English: POLITJA

Answer 6

Pulley

Question 7

Translate into English: PLA INCLINAT

Answer 7

Inclined Plane

Question 8

Translate into English: CARGOL

Answer 8

Screw

Question 9

Translate into English: RODA

Answer 9

Wheel

Question 10

Translate into English: PALANCA

Answer 10

Lever

Question 11

Which is the unit of mesurement of lenght?

Answer 11

Meter

Question 12

Which is the unit of mesurement of force?

Answer 12

Newton

Question 13

Which is the unit of mesurement of time?

Answer 13

seconds

Question 14

Which is the unit of mesurement of mass?

Answer 14

kilogram

Question 15

What is Energy?

Answer 15

Energy is the ability to do work

Question 16

What is the Mechanical Advantage?

Answer 16

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

Question 17

What is the mass of an object?

Answer 17

Is the quantity of materia this object has

Question 18

What is the weight of an object?

Answer 18

Is the force made by Earth to attract things.

Question 19

Which are the two basic simple machines?

Answer 19

The inclined plane and the lever

Question 20

What devices are variant of the inclined plane?

Answer 20

The screw and the wedge

Question 21

What devices are variants of the lever?

Answer 21

The pulley and the wheel

Question 22

Which is the conservation energy principle?

Answer 22

Energy can neither be created nor destroyed

Question 23

We can know the weight of a mass…

Answer 23

Using Newton’s Second Law

Question 24

What is an ideal machine?

Answer 24

Theoretical machine in which there is no loss of energy

Question 25

What is an actual machine?

Answer 25

Machine in which there is loss of energy

Question 26

What is friction?

Answer 26

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

Question 27

What is efficiency?

Answer 27

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

Question 28

Which is the formula used to calculate Mechanical Advantage

Answer 28

MA= Output Force / Input Force