DEPARTMENT OF PHYSICS & ENGINEERING

By

Shabangu T.B and Mbili N.E

What is Force?

http://easyscienceforkids.com/wp-content/uploads/2013/06/push-and-pull.jpg (04/08/2015)

Types of Forces

http://ontrack-media.net/science8/s8m2l6interactive1image1.gif (accessed on 21 July 2015)

Short-Range Forces

Weak Nuclear Force

Strong Nuclear Force

http://scienceblogs.com/startswithabang/files/2013/10/02-1_01pf.jpg (04/08/2015)

The Strong Nuclear Force

Holds quarks together to form protons and neutrons.

https://www.sciencenews.org/sites/default/files/9266 (accessed on 05/08/2015)

Holds nucleons together in an atom to form a nucleus

Its force carrying particles are called gluons

https://universe-review.ca/I15-02-residual.jpg (06/08/2015)

http://home.fnal.gov/~cheung/rtes/RTESWeb/LQCD_site/objects/quarktriangle.gif

Mesons

http://www.a-levelphysicstutor.com/images/nuclear/feynman05.jpg (05/08/2015)

http://milesmathis.com/pion.jpg (05/08/2015)

https://upload.wikimedia.org/wikipedia/commons/d/de/Nuclear_Force_anim.gif (06/08/2015)

VIDEO

https://www.youtube.com/watch?v=fybpxpuZ_mg

Weak Nuclear Force

Responsible for nuclear beta decay

http://homepage.eircom.net/~louiseboylan/images/weak%20force.gif (05/08/2015)

Acts on both hadrons and leptons

Its force carrying particles:

https://upload.wikimedia.org/8/89/Beta_Negative_Decay.svg/1000px-Beta_Negative_Decay.svg.png (06/08/2015)

http://www.antonine-education.co.uk/Image_library/Physics_1/Particles/Feynman_9.JPG (05/08/2015)

Electromagnetic Force

Attracts or repels two charged particles

http://3.bp.blogspot.com/ s1600/electromagnetic+attraction.png (06/08/2015)

Electric Force

Coulomb's Law

http://www.aplusphysics.com/courses/honors/estat/images/Coulombs_Law_Diagram.png (06/08/2015)

Magnetic Force

Attracts or repels two magnets

Operates in the magnetic field

https://ischoolskathleen.files.wordpress.com/2009/11/image_science009.jpg (05/08/2015)

https://hdwallpapers.cat/wallpaper/lightning_amazing_nature_storm_forces_of_hd-wallpaper-1799116.jpg (06/08/2015)

http://homepage.eircom.net/~louiseboylan/images/gravity.gif (06/08/2015)

Automatic pull between two objects which have mass

Gravitational Force

We are lighter in the moon.

http://earthobservatory.nasa.gov/Features/GRACE/Images/astronaut_jump.jpg (06/08/2015)

It has infinite range

http://www.nobelprize.org/nobel_prizes/themes/physics/brink/images/forces3.gif (05/08/2015)

Keeps the planets, stars and galaxies together

Strong Gravity

https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcQ97u3MqwXsnrxRVjYNK_ORLvdiGVQZQQAq_MNJ8aHyj7ySnlHl06/08/2015

What creates Gravity?

Gravitons?

Gravitational Waves

Space-time Curvature

VIDEO

https://www.youtube.com/watch?v=MTY1Kje0yLg

REFERENCES

http://www.universetoday.com/34824/force-of-gravity/

http://www.particleadventure.org/weak.html

http://www.physicsclassroom.com/class/newtlaws/Lesson-2/The-Meaning-of-Force