Jump to main content

Ninth Grade, Mechanical Engineering Projects, Lessons, Activities (23 results)

If you're interested in object motion and enjoy building things or taking mechanical things apart to see how they work, then it sounds like you'd be interested in mechanical engineering.

Search
Refine Results
Filter by
Sort by
Build a Mini Trebuchet
STEM Activity
1
2
3
4
5
449 reviews
You probably know what a catapult is. In the Middle Ages armies would use them to hurl stones at castle walls. But did you know about an even bigger type of medieval siege weapon called a trebuchet? Try this project to build a miniature version! Read more
Make Cardboard Automata
STEM Activity
1
2
3
4
5
101 reviews
Have you ever wondered how to create art with moving parts using nothing but cardboard, a few skewers, and some craft supplies? In this fun STEM activity, you will build an automaton, a machine that makes parts appear and disappear, move up and down, spin in circles, or all of these together. The instructions will show you how to build a moving caterpillar, but you can use your imagination to build any other animal or object you want! Read more
Protect Your 'Eggstronaut': Build an Egg-Drop Lander
STEM Activity
1
2
3
4
5
154 reviews
The egg-drop project is a classic and time-honored tradition in many science classes. The goal is usually to build a device that can protect an egg when dropped from a high location. This activity puts a twist on the classic project, motivated by real-world advances in space exploration. Can you build a reusable egg-drop lander that can survive repeated falls from the same height? Try this activity and find out Read more
Effect of Trebuchet Arm Length or Counterweight Mass on Projectile Distance
Science Fair Project Idea
Engineering Design Process
Before cannons widely replaced them, siege engines were often used by armies to throw large stones and other projectiles to break down castle walls. One of the most advanced siege engines used in the Middle Ages was the trebuchet, which used a large counterweight to store energy to launch a payload, or projectile. The horizontal distance the payload would travel is called the trebuchet's range. Figure 1, below, shows a modern reconstruction of a trebuchet. The range of a trebuchet has… Read more
Foldable Paper Robotic Gripper
Lesson Plan Grade: 6th-12th
1
2
3
4
5
5 reviews
When your students think of robots, they probably think of materials like metal or plastic—but what about paper? In this lesson plan, your students will learn to make robotic parts from readily available classroom materials. Optionally, they can apply the engineering design process to improve the design or come up with their own designs. Read more
Give Yourself a Lift: Lightening the Load with Pulleys
Science Fair Project Idea
Scientific Method
Before the Industrial Age, people relied on muscle power for moving and lifting heavy objects. Here's a project that shows you how you can use your head to make heavy lifting easier on your muscles–and your back! Read more
Applying Hooke's Law: Make Your Own Spring Scale
Science Fair Project Idea
Scientific Method
Hooke's law says that the opposing force of a spring is directly proportional to the amount by which the spring is stretched. How accurately Hooke's law describe the behavior of real springs? Can springs be used to make accurate scales for weighing objects? Spring into action and find out for yourself with this project. Read more
Build a Differential from K'Nex®
STEM Activity
1
2
3
4
5
10 reviews
What in the world is a differential and what does it do? A differential is a mechanism that helps cars go around turns without the wheels slipping. In this activity you will build your own working model differential from a building toy like K'Nex®! Read more
Build a Water Sprinkler Toy
STEM Activity
1
2
3
4
5
5 reviews
Do you enjoy playing with water? Have you ever considered building a water sprinkler toy? It is easier than it looks! Get some PVC pipes, a few connectors, and a backyard water hose, then drill a few holes and start connecting! What will be your most creative and most fun design? Read more
Building a Model Hydraulic Knuckle Crane
Science Fair Project Idea
Scientific Method
A ship is a busy place. When out to sea, naval, research, and fishing vessels pull or push heavy loads, like research equipment and crab pots, into and out of the water. But equipment and pots can weigh hundreds of pounds. So how does a ship's crew lift loads efficiently and accurately? With a hydraulic knuckle crane, of course. But what is hydraulics and why does hydraulics make certain tasks easier? Hydraulics is the study of liquids and their mechanical properties: how they move, resist… Read more
1 2 3 >

Explore Our Science Videos

Quick Links X
Top
Free science fair projects.