4.3 Types of Machines

a simple machine that consists of two

back-to-back inclined planes

• fulcrum

• wedge

• screw

• lever

a simple machine that consists of an inclined

plane wrapped around a cylinder

• fulcrum

• wedge

• screw

• lever

a simple machine made of a rigid bar that

pivots at a fixed point

• fulcrum

• wedge

• screw

• lever

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

the point at which a lever pivots

• fulcrum

• wedge

• screw

• lever

Which simple machines make a pair of scissors?

• wedge & lever

• lever & pulley

• 1st & 3rd class lever

• inclined plane & wedge

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What simple machines are used in a furniture dolly?

• wedge & pulley

• wheel & axle and screw

• wedge, lever

• wheel & axle and lever

Tags

NGSS.MS-PS2-1

How can you increase the IMA of an inclined plane?

• increasing the height

• lengthening the slope

• shortening the slope

• moving the fulcrum toward the effort

How much force is gained from a lever with an input force of 60 N and an output

force of 390 N.

• 6.5 times more force

• 15 times more force

• 23 times more force

• 65 times more force

How much force is gained from a lever with an input force of 60 N and an output

force of 390 N.

Mathematical Equivalence

ON

What determines whether a wheel and axle magnifies speed or force?

• the diameter of the axle

• the size of the wheel

• Where the effort is placed

• the direction of the resistance