PS Ch 5 #1 Machines and Work 1-41 2024

When a machine is used to do work, the force applied by the machine is called the effort force.

• True

• False

Under certain conditions, it is possible to get more work out of a machine than you put into it.

• True

• False

Some machines don't multiply the force that is applied to them.

• True

• False

Examples of all three classes of levers are found in the human body.

• True

• False

In order for work to be done on an object, the object must move.

• True

• False

Tags

NGSS.MS-PS3-5

A slanted surface used to raise an object is a(n) ____.

• efficiency board

• inclined plane

• effort ramp

• screw

Tags

NGSS.MS-ETS1-1

A device that does work with only one movement and changes the size or direction of a force is a(n) ____.

• compound machine

• screw

• effort machine

• simple machine

A bar that is free to pivot about a fixed point is a ____.

• fulcrum

• ramp

• lever

• screw

The rate at which work is done is called ____.

• efficiency

• force

• effort time

• power

The amount by which a machine multiplies an effort force is called the ____.

• efficiency factor

• mechanical advantage

• fulcrum

• resistance force

Tags

NGSS.MS-ETS1-1