Simple Machines

Which of the following is NOT a simple machine?

• Lever

• Pulley

• Bicycle

• Wedge

What is the main purpose of a simple machine?

• To make work harder

• To decrease energy use

• To make work easier by reducing force or changing direction

• To stop objects from moving

Which simple machine is used to raise a flag on a flagpole?

• Lever

• Pulley

• Wedge

• Screw

Which simple machine would you use to split a log?

• Inclined plane

• Wedge

• Screw

• Lever

What is the definition of a fulcrum?

• The force used to move an object

• The fixed point where a lever pivots

• The resistance force in a machine

• A type of inclined plane

What is friction?

• A force that pushes objects upward

• A force that opposes motion between two surfaces

• The energy created by simple machines

• The speed of a moving object

Which of the following is an example of work being done?

• Holding a book without moving it

• Pushing a box that doesn’t move

• Lifting a box onto a table

• Leaning against a wall

What is the definition of a load in a simple machine?

• The object being moved or lifted

• The energy required to move something

• The surface on which a machine rests

• The point where a lever pivots

How does gravity affect simple machines?

• It helps objects move uphill

• It pulls objects downward, affecting movement and force

• It stops all movement in a machine

• It only affects pulleys

What is effort in a simple machine?

• The force applied to do work

• The resistance that slows down movement

• The object being moved

• The surface on which a machine rests