Simple Mechines-chapter 1

Question 1

Advantages of a lever

Answer 1

Reduce force needed to carry out a task

Question 2

Disadvantages of a lever

Answer 2

Must move a greater distance than the load does

Question 3

Inclined plane advantages

Answer 3

Inclined plane makes it easier to move a box up to our desk

Question 4

Inclined plane disadvantages

Answer 4

You have to exert the force over a larger distance

Question 5

Wedge advantages

Answer 5

The wedge increases the force applied on an object

Question 6

Wedge disadvantages

Answer 6

Can only be used in one direction

Question 7

Screw advantages

Answer 7

Increase the force used

Question 8

Screw disadvantages

Answer 8

Most screw will movevery slowly

Question 9

Pulley advantages

Answer 9

Pulleys help you lift larger loads than you can on your own

Question 10

Pulleys disadvantages

Answer 10

Exert force a longer distance

Question 11

Wheel and axle advantages

Answer 11

You can go fader like on a bike

Question 12

wheel and axle disadvantages

Answer 12

The drawer back is you have to fire a greater distance wheel to apply force

Question 13

Simples we use today

Answer 13

Mill wheels nutcrackers and plows a lot more

Question 14

Lever

Answer 14

A lever is a rigid bar or plank that can rotate around a fixed point called a fulcrum or pivot levers are needed to carry out a task such as pulling a nail, opening a bottle, hitting a baseball and using scissors

Question 15

Different kinds of levers

Answer 15

1. Fist class lever has the fulcrum between the load when he point where the effort is exerted 
Ex. Pliers and claw hammer 

2. Second class lever has the load between the effort and fulcrum 
Ex.nut cracker and wheelbarrow 

3.third class lever has the effort between the load and the fulcrum 
Ex. Human arm and tongs

Question 16

Inclined plane

Answer 16

A inclined plane or ramp will help you lift thing to a higher place without having to lift it straight up

Question 17

Wedge

Answer 17

A wedge is similar in shape to an inclined plane e but it is used in a different way a wedge is force into a object by pressing on The wide end of the wedge is pushed on and the narrow end splits a object apart

Question 18

Screw

Answer 18

A screw is a cylinder with a groove cut to spiral on the outside using a screw helps you increase the force you used

Question 19

Pulleys

Answer 19

Pulleys can be made up of one or many wheels and can be fixed or moveable pulleys help you lift larger loads than you could lift on your own

Question 20

Wheel and axle

Answer 20

Wheel and axe is a combination of two or wheels o different diameters that turn together a longer motion on the wheel produces a shorter more owerful motion at the axle

Question 21

Complex mechines

Answer 21

Most mechinaces we use today are made up of several simple machines this is called complex machines a complex machine system is a system in which simple machines all work together

Question 22

Subsystems

Answer 22

Groups of parts that perform specific function such braking and steering

Question 23

Linkages

Answer 23

A complex machine moves an object by transferring energy the linkage is the part that hat transfers your energy from pedals to the back wheel

Question 24

Transmissions

Answer 24

Most machine object are more complex than a bicycle they usually move much larger loads than just one person. These machines use a special type of linkage called transmission to transfer energy. A transmission contains a number of different gears this allows the operator to apply a large force to kyour be object slowly or a smaller force to move objects quickly

Question 25

Gears

Answer 25

Gears are essential components of most mechanical systems. They consist of wheels that have teeth that interlink. When the rotate together one gear wheel transfers turning motion and force together.