Work & Simple Machines

Question 0

What is the formula for the ideal mechanical advantage of an inclined plane?

Answer 0

Length of incline divided by height of incline

Question 1

What is a inclined plane

Answer 1

A sloped surface

Question 2

True of False:

The necessary input force is less than the output force?

Answer 2

False

Question 3

True or False:

A ramp is a example of an inclined plane.

Answer 3

True

Question 4

True or False:

The necessary input force is more the the output force.

Answer 4

False

Question 5

True or False:

An inclined plane allows you to exert your force over a long distance.

Answer 5

True

Question 6

The longer the inclined place, the less _____* you need to push or pull an object.
* Fill in the blank

Answer 6

Effort?

Question 7

What is a wedge?

Answer 7

A wedge is an object that is thin at one end and thicker at the other?

Question 8

True or False:

In a wedge, the inclined plane moves itself.

Answer 8

False

Question 9

True or False:

The longer and thinner the a wedge is, the greater it’s mechanical advantage.

Answer 9

True

Question 10

What is a screw?

Answer 10

A inclined plane wrapped around a cylinder.

Question 11

The spiral inclined plane forms the ______* of a screw.

* fill in the blank

Answer 11

*thread

Question 12

When twisting a screw into a piece of wood where is the input force applied and where is the out put force exerted?

Answer 12

The input force is exerted when the screw is twisted, and the output force is exerted into the wood.

Question 12

When twisting a screw into a piece of wood where is the input force applied and where is the out put force exerted?

Answer 12

The input force is exerted when the screw is twisted, and the output force is exerted into the wood.

Question 14

What is a lever?

Answer 14

A ridged bar the pivots on a fixed point?

Question 15

The fixed point that a lever pivots around is called the____*

Answer 15

• fulcrum

Question 16

How many types of levers are there?

Answer 16

3
Class A
Class B
Class C

Question 17

What is the formula used to calculate the mechanical advantage of a lever?

Answer 17

Distance from fulcrum to output force

Question 18

What is a wheel and axel?

Answer 18

Two circular objects the rotate around an axis.

Question 19

What is the formula used to calculate the mechanical advantage of a wheel and axel?

Answer 19

Radius of axel

Question 20

What is a Pulley?

Answer 20

A grooved wheel with a rope or cable wrapped around it?

Question 21

Which kind of pulley changes the direction of the input force but not the amount but does not change the amount of force you apply?

Answer 21

A block and tackle.

Question 22

What kind of pulley has a mechanical advantage of two?

Answer 22

Moveable pulley

Question 23

What is a compound machine?

Answer 23

A machine that uses two or more simple machines?

Question 24

What do you need to know to calculate the mechanical advantage of a compound machine?

Answer 24

The mechanical advantage of the simple machines?

Question 25

In order for you to do work on an object, the object must move some _______* as a result of your force.

Answer 25

*Distan

Question 26

Why don't you do any work when you carry an object at a constant velocity?

Answer 26

Because the force is not moving in the objects direction.

Question 27

When you pull a suitcase, why does only part of your force work?

Answer 27

Because to do work you must pull the object in the direction of the object.

Question 28

The amount of work you do depends on both the amount of _____* you exert and the _______^ the object moves.

Answer 28

* Force | ^ Distance

Question 29

True or False: | Lifting a heavier object demands greater force than lifting a lighter object.

Answer 29

True

Question 30

What formula do you use to determine the amount of work done on an object?

Answer 30

Work= Force x Distance

Question 31

What is power?

Answer 31

The rate at which work is done?

Question 32

True or False: | You have greater power when run up a flight of stairs or walk up.

Answer 32

True | Duh....

Question 33

What formula do you use to calculate power?

Answer 33

Work Power= -------- Time