Simple Machines and Mechanisms

What is the purpose of a lever in a LEGO simple machine?

• To increase the speed of an object

• To hold pieces together

• To change the direction of a force

• To reduce friction between moving parts

Which LEGO piece is commonly used as an axle in simple machine builds?

• A flat plate

• A long, thin rod

• A small, round gear

• A large, square block

What advantage does a pulley system offer in constructions?

• It can change the color of the LEGO construction

• It increases the weight of the construction

• It allows for the lifting of heavy objects with less effort

• It makes the construction waterproof

In the context of LEGO simple machines, what is the primary function of wheels?

• To decorate the machine

• To increase friction

• To reduce friction and allow movement

• To connect different parts of the machine

How do axles and wheels work together in a LEGO mechanism?

• The axle supports the structure, while wheels add weight

• Axles rotate the wheels to facilitate movement

• Wheels power the axle for increased speed

• Axles and wheels are purely decorative

What is a simple machine?

• A complex robotic system

• A device that uses electricity to function

• A tool that changes the direction or magnitude of a force

• A machine that can only perform one task

Which of the following is NOT a characteristic of a lever?

• It has a fulcrum

• It always reduces the amount of effort needed

• It can change the direction of a force

• It can be made from various materials

What role do axles play in LEGO simple machines involving gears?

• They connect gears to the power source

• They prevent gears from turning

• They are purely decorative and have no functional purpose

• They transfer rotational motion from one gear to another

In a LEGO pulley system, what does the pulley wheel do?

• It decreases the weight of the object being lifted

• It changes the direction of the force applied

• It counts the number of times the rope is pulled

• It increases the force needed to lift an object

Why are wheels important in LEGO vehicles?

• They allow the vehicle to fly

• They make the vehicle more colorful

• They enable the vehicle to move smoothly over surfaces

• They increase the weight of the vehicle