Quick watch

an easy Machines
grade Level: 8 (7 – 9) class in thisUnit: 1 2 3 4 5 Time Required: 15 minutes topic Areas:
Physical science

NGSS performance Expectations:


Units offer as guides to a specific content or subject area. Nested under units are lessons (in purple) and hands-on tasks (in blue).

You are watching: What kind of simple machine is a rake

note that no all class and activities will exist under a unit, and also instead may exist together "standalone" curriculum.

basic Machines The benefit of equipments simply Plane straightforward Levers that Lift not So basic Rube Goldberg and also the meaning of devices
Unit Lesson Activity

Figure 1. A lever, one of the six straightforward machines.


students are presented to 3 of the six simple machines used by plenty of engineers: lever, pulley, and also wheel-and-axle. In general, engineers use the lever to magnify the force applied to one object, the pulley to lift heavy loads end a upright path, and also the wheel-and-axle to magnify the torque used to an object. The mechanical benefit of these devices helps determine their capacity to make work less complicated or make work-related faster. This engineering curriculum to adjust to next Generation scientific research Standards (NGSS).

Engineering connection

Simple equipments are extremely beneficial to engineers since they are provided to achieve extraordinary amounts of occupational with ease. In particular, designers can style a simple machine which gives a wanted mechanical advantage so the work have the right to be excellent (more) efficiently and effectively. Even the most complex machines draft by engineers today are a combination of one or an ext of the 6 known straightforward machines. The lever, pulley, and also wheel-and-axle have the right to be discovered in many engineered devices, such together a crowbar, crane, and bicycle.

finding out Objectives

After this lesson, students have to be may be to:

Explain just how the lever, pulley, and wheel-and-axle make occupational easier.Identify how the lever, pulley, and wheel-and-axle are offered in plenty of familiar engineering systems today.Discuss the mechanical benefit of a lever, pulley and wheel-and-axle.

Educational requirements

each great or activity is correlated to one or more K-12 science, technology, design or math (STEM) educational standards.

every 100,000+ K-12 STEM standards covered in are collected, maintained and also packaged by the Achievement criter Network (ASN), a job of D2L (

In the ASN, standards are hierarchically structured: very first by source; e.g., through state; within resource by type; e.g., science or mathematics; within form by subtype, then by grade, etc.

NGSS: following Generation scientific research Standards - scientific research
NGSS power Expectation scientific research & engineering Practices Disciplinary Core concepts Crosscutting ideas

MS-PS2-2. Arrangement an examination to administer evidence the the readjust in one object"s activity depends top top the amount of the pressures on the object and also the massive of the object. (Grades 6 - 8)

carry out you agree through this alignment? thanks for her feedback!

Click come view other curriculum aligned come this power Expectation
This lesson focuses on the complying with three Dimensional Learning aspects of NGSS:
Science expertise is based upon reasonable and conceptual connections between evidence and explanations.

Alignment agreement: many thanks for your feedback!

The movement of an object is figured out by the amount of the pressures acting top top it; if the total force ~ above the object is no zero, its activity will change. The greater the mass of the object, the higher the force needed to attain the same adjust in motion. For any kind of given object, a bigger force reasons a larger change in motion.

Alignment agreement: many thanks for your feedback!

All positions of objects and also the direction of forces and motions need to be defined in one arbitrarily favored reference frame and arbitrarily liked units the size. In order come share information with various other people, these choices must also be shared.

See more: How Many Degrees Fahrenheit Is 10 Degrees Celsius, Temperature Conversion: Celsius To Fahrenheit

Alignment agreement: many thanks for her feedback!

Explanations of security and readjust in natural or draft systems have the right to be created by assessing the alters over time and also forces at various scales.

Alignment agreement: many thanks for your feedback!

International an innovation and design Educators association - modern technology