Simple Machines Review

What is a simple machine?

• A device made of 1 or 2 parts that makes work easier to do

• A device made of 3 or more parts that makes work easier to do

• A device that makes work harder to accomplish

• A tool used for measuring weight and mass

What is the purpose of a simple machine?

• To increase the speed of an object

• To make work easier by changing the direction or magnitude of a force

• To generate electricity

• To measure temperature

How many types of simple machines are there?

• Four

• Six

• Eight

• Ten

What is a complex machine?

• A machine made up of two or more simple machines

• A machine that operates without energy

• A machine that cannot be moved

• A machine that is used only in laboratories

What is a force?

• A push or pull

• A measure of temperature

• A type of energy

• A unit of mass

What are the two components that a force has?

• Mass and volume

• Direction and magnitude

• Speed and velocity

• Energy and power

How is force measured?

• In kilograms (kg)

• In meters (m)

• In Newtons (N)

• In Joules (J)

What is the difference between mass and weight?

• Mass is a measure of force pulling on an object, weight is a measure of volume of an object

• Mass measures the amount of material, weight measures the force of gravity pulling on an object

• Mass is measured in newtons, weight is measured in kilograms

• Mass is a type of energy, weight is a type of force pulling on an object

What does mechanical advantage mean?

• The ability to perform work without energy

• The ratio of output force to input force

• The speed at which a machine operates

• The energy required to start a machine

What is the scientific definition of work?

• The energy transferred when a force is applied on an object over a distance

• The speed at which an object moves times the distance

• The amount of matter in an object

• The force exerted by an object