PS 14.2 Formative

A machine is a device that can multiply

Machines make work easier in three ways. Which of the following is NOT an example of this

• machines increase force

• machines increase distance

• machines change direction of a force

• machines increase work output

When a machine does work, it cannot do which of the following?

• change the direction of a force

• increase a force and change the distance a force moves

• increase the distance a force moves and change the direction of a force

• increase a force and increase the distance a force moves an object

Tags

NGSS.MS-PS3-5

Output work is always less than input work because of friction

• true

• false

Tags

NGSS.MS-PS3-5

The only way to increase the work output is to increase the amount of work you put into a machine.

• true

• false

The force you exert on a machine

• input force

• input distance

• work input

• work output

The distance the input force acts through

• input force

• output force

• input distance

• work input

The work done by the input force acting through the input distance.

• work input

• input power

• input velocity

• horsepower

Tags

NGSS.MS-PS3-5

The work done by the output force acting through the output distance.

• work output

• output power

• output velocity

• horsepower

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

The force that is exerted by a machine

• output force

• input force

• output power

• work output