Using Machines

What do machines convert input work to?

• output force

• output distance

• input distance

• output work

An efficiency of more than one means

• the output force is greater than the input force

• the input force is greater than the output force

• the output work is greater than the input work

• the input work is greater than the ouput work

Tags

NGSS.MS-PS3-4

What is the MA of a machine that increases an input force of 5N to an output force of 15N?

• 1

• 3

• 75

How can a machine make work easier without changing the size of the force or the distance over which the force acts?

• It can't.

• By decreasing friction.

• By changing the direction of the force.

• By reducing the amount of work needed.

Tags

NGSS.MS-ETS1-2

Which of the following is a measure of a machine's efficiency?

• The amount of energy it consumes

• The ratio of useful work output to total work input

• The speed at which it operates

• The size of the machine

Tags

DOK Level 1: Recall

Select the vocabulary word that matches with the definition below:

A machine that changes something by a special treatment or takes care of something according to a routine.

Seleccione la palabra de vocabulario que coincida con la siguiente definición:

Una máquina que cambia algo por un tratamiento especial o se encarga de algo de acuerdo con una rutina.

以下の定義に一致する語彙を選択します。

特別な扱いで何かを変えたり、ルーチンに従って何かを世話したりする機械。

• PROCESSOR

• INTERACTION

• MICROCONTROLLER

• INTERFERENCE

What is a lever?

• A type of pulley

• A simple machine that consists of a rigid bar pivoted on a fulcrum

• A device that measures force

• A type of inclined plane

Tags

DOK Level 1: Recall

In how many ways can a machine make work easier?

• 1

• 2

• 3

• 5

…. is a something that makes work easier to do.

• Energy

• Work

• Swing

• Machine

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

What statement is not true about machine?

• Machines change the way you do the work

• Some machines change the direction in which you push or pull

• Some machines help you use less force to do work

• A machine makes work more difficult to do

Tags

NGSS.MS-ETS1-1