Simple Machines and Efficiency

the ratio of output force to input force

• work

• mechanical advantage

• efficiency

• power

the percentage of the input work that is converted to output work

• mechanical advantage

• efficiency

• joule

• machine

a simple machine that is a flat, sloped surface

• inclined plane

• wedge

• lever

• fulcrum

a device that is thick at one end and tapers to a thin edge at the other end

• wedge

• inclined plane

• lever

• fulcrum

Tags

NGSS.MS-PS2-2

a rigid bar that is free to pivot, or rotate, on a fixed point

• wedge

• inclined plane

• lever

• fulcrum

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

a simple machine that acts like an inclined plane wrapped around a cylinder

• screw

• pulley

• fulcrum

• compound machine

a simple machine made of two circular or cylindrical objects fastened together that rotate about a common axis

• wheel and axle

• pulley

• screw

• compound machine

Tags

NGSS.MS-PS2-1

a simple machine made of a grooved wheel with a rope or cable wrapped around it

• pulley

• wheel and axle

• screw

• lever

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

a device that allows you to do work in a way that is easier

• machine

• compound machine

• work

• power

Tags

NGSS.MS-PS2-2

the force you exert on the machine

• input force

• output force

• efficiency

• mechanical advantage