Simple Machines and Their Functions

The video tutorial explains simple machines, which perform work with a single movement. It covers six types: lever, pulley, wheel and axle, inclined plane, screw, and wedge. Levers are divided into three classes based on the fulcrum's position. Pulleys, as modified levers, are used in systems like block and tackle. Inclined planes reduce force needed to move objects, with screws and wedges as variations. The tutorial highlights practical examples and applications of these machines.

What is a simple machine?

• A machine that cannot be modified

• A machine that does work with only one movement

• A machine that combines several complex machines

• A machine that requires multiple movements to perform work

Which of the following is NOT a type of simple machine?

• Inclined Plane

• Engine

• Pulley

• Lever

In a first-class lever, where is the fulcrum located?

• Between the input and output force

• At the end of the lever

• Closer to the input force

• Closer to the output force

Which class of lever is a wheelbarrow an example of?

• First-class lever

• Second-class lever

• Third-class lever

• None of the above

What is a fixed pulley?

• A pulley that is attached to a moving object

• A pulley that moves with the load

• A pulley that is attached to a stationary object

• A pulley that cannot be used with ropes

What is a block and tackle system?

• A single pulley system

• A combination of fixed and movable pulleys

• A type of lever

• A type of inclined plane

How does a screw function as a simple machine?

• By using a grooved wheel

• By rotating around a fixed point

• By sliding on a flat surface

• By wrapping an inclined plane around a post

What is the primary function of a wedge?

• To lift objects

• To change the direction of force

• To rotate objects

• To reduce friction

Which of the following is an example of a wheel and axle?

• A knife

• A pulley

• A door knob

• A seesaw

How is a wheel and axle similar to a lever?

• It cannot rotate

• It requires multiple movements

• It is a modified lever

• It uses a fulcrum to pivot