Understanding Simple Machines

What are the six types of simple machines?

• lever, wheel, axle, block, tackle, spring

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

• gear, lever, wheel, axle, pulley, ramp

• screw, wedge, lever, gear, pulley, platform

How does a lever work?

• A lever works by using gravity to pull objects downwards.

• A lever operates by balancing weights on either side without any movement.

• A lever functions by creating friction to hold objects in place.

• A lever works by using a fulcrum to amplify force, allowing a small input force to lift a larger load.

What is the purpose of a pulley?

• The purpose of a pulley is to lift heavy objects more easily by changing the direction of force and reducing the effort needed.

• To measure weight accurately

• To store energy for later use

• To create friction for better grip

Can you give an example of a wheel and axle?

• A doorknob.

• A clock hand.

• A bicycle pedal.

• A steering wheel.

What is the mechanical advantage of a ramp?

• Mechanical advantage = height of ramp + length of ramp

• Mechanical advantage = height of ramp / length of ramp

• Mechanical advantage = length of ramp / height of ramp

• Mechanical advantage = height of ramp - length of ramp

How does a screw function as a simple machine?

• A screw only holds objects together without any motion.

• A screw functions by creating friction between surfaces.

• A screw operates solely by pushing objects downwards.

• A screw converts rotational motion into linear motion, functioning as an inclined plane.

What is the difference between a fixed and movable pulley?

• A fixed pulley is stationary and helps change the direction of force, while a movable pulley moves with the load and reduces the effort needed to lift it.

• Both fixed and movable pulleys are used to lift loads in the same way.

• A fixed pulley moves with the load and changes the direction of force.

• A movable pulley is stationary and does not reduce the effort needed to lift.

How do simple machines make work easier?

• They eliminate the need for any force when moving objects.

• Simple machines make work easier by reducing the amount of force needed to move objects.

• They only work with specific types of materials.

• They increase the weight of objects to make them easier to lift.

Can you name a real-life application of a wedge?

• Screwdriver

• Pliers

• Knife

• Hammer

What role do simple machines play in complex machines?

• Simple machines are outdated and not used in modern technology.

• Simple machines are only used in construction.

• Complex machines do not require simple machines to operate.

• Simple machines provide the basic mechanical advantages that enable complex machines to function efficiently.