1
Give an example of a second-class lever.
Wheelbarrow
A part of a machine that helps it move or do work.
Mechanism
A straight rod that allows a wheel or part to rotate.
Axle
A machine used to lift and move heavy materials on building sites.
Tower crane
At what angle are the depth lines drawn in oblique drawings?
45 degrees
It is usually made of many simple mechanisms connected together.
Machines
What is the first step in the design process?
Investigating the problem
What type of structure should a crane model be built as?
A frame structure
Information where the sequence of steps in a process from start to finish.
Flowchart
The limits or restrictions that affect the design.
Constraints
What are the three main parts of a winch?
Drum, crank, and axle
A wheel with a rope or chain that helps lift or move loads.
Pulley
What is meant by distance advantage in machines?
The effort moves a greater distance than the load
In a first-class lever, where is the fulcrum located?
Between the effort and the load
Why should magnetic and non-magnetic metals be sorted during recycling?
To make recycling easier and more efficient
What mechanisms are used in a tower crane?
Lever, pulley, and wheel-and-axle
What movement should the crane arm be able to perform?
It should pivot or move up and down
What does mechanical advantage do?
It reduces the effort force needed to move a load
What should students do when giving a presentation?
Speak clearly and maintain eye contact with the audience
What is the main use of a tower crane?
To lift heavy materials at construction sites
What is the function of the drum in a winch?
To wind or roll up the rope or cable
Why is reflection important after completing a project?
It helps students learn from mistakes and improve their work
Why are mechanisms important in machines?
They help people do work more easily and efficiently
How should students evaluate other groups’ models?
They should evaluate them objectively and fairly
Why is an A-frame structure strong?
Because the triangular shape provides strength and stability