Inventions for Better Life: Practice Questions

When designing a cooking pot, why is the handle usually made of wood or plastic instead of metal?

As shown in the diagram, a worker uses a long plank to create a ramp (an inclined plane) to move a heavy barrel onto a truck. How does this simple machine make the work easier?

The invention of 3D printing technology has significantly advanced how products are made. Which of the following statements best describes a complex advantage of 3D printing, especially when creating highly specialized or customized objects, compared to traditional manufacturing?

Many inventions, such as non-slip bathroom mats and sports shoes, are designed with rough surfaces to keep us safe. Which force is increased by these rough surfaces to prevent people from slipping or falling?

An inclined plane, such as a ramp, is a common simple machine. What is the primary benefit of using an inclined plane to move an object vertically?

The wheel and axle is a common simple machine used to move objects easily. What is the primary function of the wheel and axle, and name one item found at home that uses this invention?

A wheelbarrow is a simple machine often used in gardening or construction. Explain how a wheelbarrow makes work easier and name the type of simple machine it represents.

A common invention in transportation is the gear system found in bicycles, which functions as a simple machine. Explain two distinct advantages of using a system of gears when riding a bicycle up a steep hill, and describe the fundamental trade-off that allows the rider to climb the hill with significantly less effort than if they used a single, fixed gear.

Imagine you are designing a playground for your school. A seesaw is a popular piece of equipment.
(a) What type of simple machine is a seesaw? Explain how this simple machine helps people lift or balance objects.
(b) If you were to choose two common materials for the main beam of the seesaw to ensure it is durable and safe for children, which two materials would you select and why?

Technological advancements have transformed our daily lives.
(a) Describe two specific benefits of "smart home" technologies (e.g., smart lights, smart thermostats) for people in their everyday life, and how they contribute to a "better life."
(b) Imagine you want to program a simple robot to bring you a specific book from a shelf in your room. Outline three steps a programmer might use, showing computational thinking, to break down this task into smaller, solvable parts for the robot.
(c) With new technologies constantly emerging, what is one significant safety responsibility that individuals have when using these advanced devices or systems?