Work and Machines

Question 1

What is needed for work to be done

Answer 1

Distance

Question 2

Work is measured in what

Answer 2

Joules

Question 3

SI unit of power

Answer 3

Watt

Question 4

Why do we machines

Answer 4

Machines make it easier to do work

Question 5

What is it called when you use a machine

Answer 5

Mechanical Advantage

Question 6

If you increase distance what else do you increase

Answer 6

You increase Advantage

Question 7

IMA means

Answer 7

The ideal mechanical advantage

Question 8

AMA means

Answer 8

Actual mechanical advantage

Question 9

IMA is always greater than what

Answer 9

AMA

Question 10

A simple machine that consists of a rigid bar that turns on a pivot point

Answer 10

Lever

Question 11

A force that tends to cause q rotation about a pivot point

Answer 11

Torque

Question 12

A system is in rotational equilibrium when the sum of torques on the system is zero

Answer 12

Law of Torques

Question 13

In the 1st class lever what os in the middle

Answer 13

The fulcrum

Question 14

In the 2nd class lever what is in the middle

Answer 14

The output force

Question 15

In the 3rd class lever what is in the middle

Answer 15

The input force

Question 16

A simple machine consisting of a wheel with a rod running through its axis that acts as the pivot point

Answer 16

Wheel and Axle

Question 17

A wheel and azle is a modification of what

Answer 17

A lever

Question 18

A simple machine that consists of a wheel with teeth

Answer 18

Gear

Question 19

A simple machine that consists of a wheel and axle system with a Groove around the perimeter of the wheel in which a rope belt or cable moves with the wheel as it rotates

Answer 19

Pulley Systems

Question 20

IMA = 1

Answer 20

Single fixed pulley

Question 21

IMA = 2

Answer 21

Single moveable pulley

Question 22

IMA = number of rope segments (4)

Answer 22

Block and Tackle

Question 23

Additional pulleys mean

Answer 23

Additional friction

Question 24

More friction means less what

Answer 24

Less efficiency

Question 25

A simple machine that consists of a plane whose opposite ends are at different heights

Answer 25

Inclined Plane

Question 26

What kind of inclined planes have a higher mechanical advantage

Answer 26

Shallower

Question 27

Mechanical advantage depends on what

Answer 27

Steepness

Question 28

A simple machine consisting of two inclined planes attached at an acute and used to separate a material apart

Answer 28

Wedge

Question 29

What are two examples of inclined planes

Answer 29

A wedge and a screw

Question 30

A simple machine that consists of an inclined plane wrapped around a cone or a cylinder in a spiral pattern

Answer 30

Screw

Question 31

In a screw where does the mechanical advantage come from

Answer 31

It's threads

Question 32

The steeper the thread the __?__ mechanical advantage you gain

Answer 32

Less

Question 33

A machine that combines 2 or more simple machines

Answer 33

Compound machine

Question 34

Example of a 1st class lever

Answer 34

Seesaw