Simple Machines- A simple machine is a _________________, composed of only one or two parts, that requires a ______________ force to work.

- The stapler works by applying a single _____________________ force at its open end.

- Like the stapler, the mechanisms of most physical systems are made of one or more simple machines that work alone or together to make physical tasks such as nailing, cutting, throwing, carrying, chopping and prying easier to do.

There are six simple machines:

- the _____________________ plane

- the ________________________

- the ________________________

- the ________________________

- the ________________________

- the ________________________

- These simple machines can be categorized into two groups

- those related to the __________________ plane (the _________________ and the _____________)

- those related to the lever (the ____________________ and ______________ and the _________________).

Inclined Plane

- Makes __________________ easier. The force needed to ________________ an object up an inclined plane is ______________ than the force needed to lift it __________________ up.

Examples _____________________________________________________________________________

Drawing

Wedge

- _____________ materials apart, _______________ things.

- You must _________________ a force to a ____________________ for it to work.

- As the wedge is _________________ into the object, the __________________ splits.

Examples _____________________________________________________________________________

Drawing

Screw

- A screw is a ________________________ with an ______________________ plane wrapped __________________ it.

- Turns __________________________ into ___________________ movement.

- Takes many ______________ to go a short distance.

- _____________ things together.

Examples _____________________________________________________________________________

Drawing

Lever

- Makes _________________ weight easier by using a ________________ to redirect force over a longer distance.

- The ______________ arm is the part of the bar ________________ the fulcrum and the object (load) you want to move.

- The ___________________ arm is the part of the bar between the _________________ and where the effort is applied

Examples ______________________________________________________________________________

Drawing

Class 1 levers: the fulcrum is ___________________ the load force and the input force.

Class 2 levers: the load force is __________________ the fulcrum and the input force.

Class 3 levers: the input force is _________________ the fulcrum and the load force.

Wheel and Axle

- Makes it easy to move things by _______________ them, and reducing __________________.

- You can apply force on the ______________ to turn the __________or apply force on the axel to turn the wheel.

- Examples _____________________________________________________________________________

Pulley

- Makes _______________ things with a rope easier by redirecting ________________ and the addition of additional ____________.

- As you _________ a line over the ____________, you move the

___________.

- Examples:

______________________________________________________

________________________

Gears

- A gear is a ____________________ wheel and axle.

- Gears are ___________________ wheels, most commonly made of ___________ or __________________.

- They are used to ______________ up or ___________ down motion, or to change the ___________________ of motion.

Pushes material apart, cuts

Wheeland Axle

Makes it easy to move things by rolling them, and reducing friction

Lever

Makes it easier to move objects upward; a longer path, but easier lifting

Pulley

CHECK YOUR LEARNING

1. Which of the six simple machines relates the most to your everyday life? Explain.

2. Complete the following table

Simple Machine Example How Society Uses it to Make Life Easier