Unit 6b Review: Simple Machines

A machine that combines two or more simple machines

• Inclined plane

• Screw

• Compound machine

• Wheel and axle

The number of times a machine increases a force exerted on it

• Mechanical advantage

• Efficiency

• Fulcrum

• Compound machine

1.      The fixed point around which a lever pivots

• Inclined plane

• Fulcrum

• Output force

• Input force

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

• Mechanical advantage

• Efficiency

• Output force

• Input force

Which type of lever has the resistance force in the middle?

• 1st class

• 2nd class

• 3rd class

A simple machine that consists of a rigid bar that pivots around a fixed point

• Inclined plane

• Pulley

• Wedge

• Lever

A simple machine that consists of a grooved wheel with a rope wrapped around it

• Pulley

• Screw

• Wedge

• Wheel & axle

A simple machine that has a flat, sloped surface

• Inclined plane

• Screw

• Wheel & axle

• Pulley

Tags

NGSS.MS-ETS1-1

A simple machine that is an inclined plane wrapped around a central cylinder to form a spiral

• Screw

• Lever

• Pulley

• Wedge

Which type of lever has the effort force in the middle?

• 1st class

• 2nd class

• 3rd class