Machines

What are the two main types of machines?

• Robotic and manual machines

• Digital and analog machines

• Mechanical and electrical machines

• Simple machines and complex machines

Name three examples of simple machines.

• lever, pulley, inclined plane

• hammer

• wheelbarrow

• screwdriver

What is a lever?

• A lever is a type of wheel that rotates around an axis.

• A lever is a type of pulley used for lifting.

• A lever is a tool for measuring weight.

• A lever is a simple machine that amplifies force using a rigid bar and a fulcrum.

How many classes of levers are there?

• 4

• 3

• 5

• 2

Give an example of a first-class lever.

• Wheelbarrow

• Seesaw

• Pulley

• Scissors

What is the function of a pulley?

• To store energy for later use.

• To measure the weight of objects.

• To create friction for better grip.

• The function of a pulley is to lift heavy objects and change the direction of force.

Identify a second-class lever in everyday life.

• Pliers

• Wheelbarrow

• Hammer

• Scissors

What is the difference between a fixed pulley and a movable pulley?

• Both pulleys are used to change the direction of force only.

• A fixed pulley can lift heavier loads than a movable pulley.

• The main difference is that a fixed pulley does not move with the load, while a movable pulley moves with the load.

• A movable pulley is always fixed in one position.

Name a tool that is an example of a wedge.

• Saw

• Hammer

• Screwdriver

• Knife

What is the purpose of an inclined plane?

• To create a flat surface for rolling objects.

• To provide a stable base for construction.

• To increase the speed of an object.

• To reduce the amount of force needed to lift an object.