Force and Motion (Dingle)

There are ___ simple machines.

• 5: inclined plane, rope, cart, wheel, car

• 6: inclined plane, wheel and axle, wedge, lever, pulley, screw

• 2: car and lever

• 4: screw, desk, car, light

What is an unbalanced force?

• when an object is still

• when forces are oushed on an object

• when one or more force acting on the object is stronger than others. Creates movement.

• when an object is moving

What is a balanced force?

• when an object is being pushed

• when an object is being pulled

• when an object is moving

• when forces acting upon an object are all EQUAL. There is NO movement.

Gravity...

• pushes things away from earth

• pulls objects towards earth

• doesn't exist

• only occurs on the moon

All simple machines...

• only work on things you push

• make work easier

• make work harder

• defy gravity

Which picture shows a pulley?

• 
• 
• 
• 

Which picture shows a wheel and axle?

• 
• 
• 
• 

Which description describes a lever?

• a heavy object

• when you push down on one side, the other side goes up! an example is a see saw

• a steering wheel

• helps you push things up. a ramp is an example

A ramp is an example of

• an inclined plane

• a pulley

• a screw

• an unbalanced force

A screw looks like...

• a ramp

• a see saw

• 
•