A simple machine reduces the force required to do work by changing the ___ or direction of the force.

• work
• distance
• motion

Tags

NGSS.MS-ETS1-1

Inclined planes that are wound around a post or cylinder are called ___.

• block and tackle systems
• wedges
• screws
• ramps

Door knobs and steering wheels are examples of ___.

• inclined planes
• pulleys
• wheel and axles
• levers

Tags

NGSS.MS-PS2-1

An important way to improve the efficiency of a machine is to __ the amount of friction.

• increase
• decrease
• maintain

Tags

NGSS.MS-PS2-1

A ___ is a device that helps reduce the amount of force required to do work.

• Newton
• spring scale
• simple machine

Tags

NGSS.MS-ETS1-1

What type of compound machine consists of a lever and a wedge?

• bicycle
• shovel
• fishing pole

Tags

NGSS.MS-PS2-1

What type of compound machine has two levers and two wedges?

• scissors
• bicycle
• fishing pole

Is work or no work being done on the backpack?  A student holds a backpack.

• work
• no work

When using an inclined plane, do you want a long or short ramp?

• long
• short

Is work or no work being done on the grocery cart?  A man pushes a grocery cart.

• work
• no work

Tags

NGSS.HS-PS2-1