Displaying 1 - 10 of 13 Resources

Average velocity and speed worked example

Solving a word problem to find average velocity and speed of an object in one-dimension.

Subject and Topic
Form 2
Physics
Motion in a straight line
Speed and velocity
Resource Type
Video
Language
English
Publisher
Khan Academy
Publication Date
2018
Creator/Author
Sal Khan
Keyword
Velocity
Speed
One dimensional motion

Calculations on motion in one dimension

In this unit you will apply your understanding of the components of motion in one dimension using linear equations. This will help you to solve problems about motion in one direction and equip you to understand how these concepts apply to everyday life.

There are three equations for linear motion with constant acceleration. They can be used to calculate, and therefore predict, the outcome of motion when three out of the four variables are known.

Subject and Topic
Form 2
Physics
Motion in a straight line
Speed and velocity
Resource Type
Werkbladen en klassikale activiteiten
Language
English
Publisher
Department of Higher Education
Publication Date
No date
Creator/Author
Leigh Kleynhans
Contributor
Michael Atkinson
Keyword
Motion
Initial Velocity
Final Velocity
Acceleration

Cell theory

Introduction to cell theory--the idea that 1) all living things are made of one or more cells, 2) cells are the basic unit of life and 3) all cells come from other cells. Explore the roles that Hooke, Leeuwenhoek and others played in developing cell theory.

Hooke and Leeuwenhoek were two of the first scientists to use microscopes to study the microscopic world of cells. Hooke coined the term "cell" after observing the tiny compartments in cork, while Leeuwenhoek discovered a variety of living creatures in pond water, blood, and other samples. They contributed to the cell theory by suggesting that cells are the fundamental units of life and structure, and that all living things consist of one or more cells that originate from other cells by division. 

Subject and Topic
Form 1
Biology
Cell structure and organisation
Concept of cells
Resource Type
Video
Language
English
Publisher
Khan Academy
Publication Date
2015
Creator/Author
Sal Khan
Keyword
Cells

Cells and organisms

All living things are made up of cells, which is the smallest unit that can be said to be alive. An organism may consist of one single cell (unicellular) or many different numbers and types of cells (multicellular).

Subject and Topic
Form 1
Biology
Cell structure and organisation
Concept of cells
Resource Type
Video
Language
English
Publisher
Khan Academy
Publication Date
2022
Creator/Author
Khan Academy
Keyword
Cells

Inclined plane force components

Explore the various forces acting on a block sitting on an inclined plane. Learn how to break the force of gravity into two components - one perpendicular to the ramp and one parallel to the ramp. Finally, using geometry and trigonometry, learn how to calculate the magnitude of each component of force that is acting on the block.

Subject and Topic
Form 2
Physics
Motion in a straight line
Speed and velocity
Resource Type
Video
Language
English
Publisher
Khan Academy
Publication Date
2011
Creator/Author
Sal Khan
Keyword
Inclined plane
Force
Work

Instantaneous speed and velocity

Instantaneous speed is a measurement of how fast an object is moving at that particular moment. Instantaneous velocity is a vector quantity that includes both the speed and the direction in which the object is moving. Learn how to find an object’s instantaneous speed or velocity in three ways - by using calculus, by looking at the slope of a given point on a graph of an object’s rate vs. time, or by using kinematic formulas if the object’s acceleration is constant. 

Subject and Topic
Form 2
Physics
Motion in a straight line
Speed and velocity
Resource Type
Video
Language
English
Publisher
Khan Academy
Publication Date
2013
Creator/Author
David SantoPietro
Keyword
Speed
Velocity

Introduction to the cell

Introduction to the cell.

Subject and Topic
Form 1
Biology
Cell structure and organisation
Concept of cells
Resource Type
Video
Language
English
Publisher
Khan Academy
Publication Date
2017
Creator/Author
Sal Khan
Keyword
Cells

More on Newton's second law

An elaboration on how to use Newton's second law when dealing with multiple forces, forces in two dimensions, and diagonal forces.

Subject and Topic
Form 2
Physics
Newton's law of motion
2nd law of motion
Resource Type
Video
Language
English
Publisher
Khan Academy
Publication Date
2016
Creator/Author
David SantoPietro
Keyword
Second Law of Motion
Motion
Newton

Newton's second law of motion

Newton's second law of motion is F = ma, or force is equal to mass times acceleration. Learn how to use the formula to calculate acceleration.

Subject and Topic
Form 2
Physics
Newton's law of motion
2nd law of motion
Resource Type
Video
Language
English
Publisher
Khan Academy
Publication Date
2012
Creator/Author
Sal Khan
Keyword
Laws of motion
Second Law of Motion
Newton

Optimal angle for a projectile part 1: Components of initial velocity

You want a projectile to fly as far as possible, at which angle should you launch it? We'll start with formulas for the initial velocity.

Subject and Topic
Form 2
Physics
Motion in a straight line
Speed and velocity
Resource Type
Video
Language
English
Publisher
Khan Academy
Publication Date
2011
Creator/Author
Sal Khan
Keyword
Initial Velocity
Projectile motion
Speed