Types of Motion
What are the three main types of motion?
Linear, rotary, and transforming.
What is a simple machine?
A tool or device that makes work easier by changing the amount or direction of force.
What is a mechanism?
A system of parts that work together to perform a task.
What is a force?
A push or pull that makes something move, stop, or change direction.
Name one machine you use every day and its purpose.
Example Answer: Scissors to cut paper
Give an example of something that uses rotary motion.
A wheel, fan, or spinning top.
Name three types of simple machines.
Lever, pulley, wheel and axle, wedge, screw, or inclined plane.
Name one part of a lever and its purpose.
Fulcrum – the point the lever turns around.
How does a pulley change force?
It changes the direction of the force to make lifting easier.
How might machines help people who have trouble walking?
They make daily tasks easier, like wheelchairs or automatic doors.
What kind of motion happens when a toy car rolls down a ramp?
Linear motion.
How does a lever make work easier?
It allows you to lift or move objects with less force by using a fulcrum.
What happens when a gear is missing a tooth?
It can’t transmit motion smoothly or may stop working.
Why do ramps make it easier to move something heavy?
They let you use less force over a longer distance.
How can machines have a negative effect on the environment?
Pollution, waste, or overuse of energy.
How does a mechanism transmit rotary motion to linear motion?
Through connected parts like gears or levers that change direction.
What simple machine helps raise a flag on a flagpole?
A pulley.
How do gears transmit motion from one gear to another?
When one gear turns, its teeth push the next gear’s teeth, making it move.
What happens to force when you move the fulcrum closer to the load on a lever?
It takes less effort to lift the load.
Why might different communities use different machines?
Because of their needs, location, or available resources.
If your playground design had a seesaw, what type of motion would it use?
Rotary motion around a central point (fulcrum).
How could two simple machines work together in one mechanism?
Example of a Correct Answer: A wheel and axle connected to a pulley to lift or spin something (compound machine).
How do pulleys and levers both help us use force?
They both change the direction or amount of force needed to move something.
How do machines make work easier without doing the work for us?
They reduce the amount or change the direction of the force we need to use.
How could your playground machine be designed to help people and the environment?
Use of safe materials and making a design that everyone can use.