Non-Contact Forces

Discover non-contact forces like gravity and magnetism in action!

GCSE Physics (Single Science) Revision Click here to open the link.Be sure to readBOTH pages (1 2). While reading complete the questions on your worksheet to fill in the blanks below. Two Types of Forces Contact forces only act between objects that are physically touching each other. Non-contact forces are forces that act between two objects that are not physically touching each other. A magnet could move a metal object without touching it. As a piece of paper slowly falls to the ground, the first type of force acting on the paper in the direction of the ground is gravity. As the same piece of paper slowly falls to the ground, the second type of force acting on the paper in the direction of opposite of the ground is air resistance. Complete the chart below with the correct contact and non-contact force examples. Non-contact forces Contact forces Magnetic Tension Electrostatic Reaction Gravitational Friction Muscular and frictional, Non contact force Click here to read aboutNon-Contact ForcesYou MUST scroll down to find theORANGEheading"non-contact forces"to find the correct information. 3 Non-Contact Forces Using your knowledge of which metals magnets attract- fill in the mnemonic image below with each metal that begins with that letter. Iron Cobalt Steel Nickel Electrostatic forces are the forces exerted by a _ body. Charged Uncharged Larger Earthly Unlike electrostatic charges will _each other Repel Attract Do nothing Gravitational force is exerted on any two _ in the universe. Earths Bodies Electrostatics Magnets What type of force is gravitational force (what does it cause two objects to do)? Repel Attract Disappear Sphere of influence of non-contact forces such as magnetic force, gravitational force, electrostatic force is called a(n)_? Force Field Mechanical Field Magnet Lambda Magnetic Fields •A magnetic field is around a magnet where the forces can act•The closer together to field lines are the stronger the magnetic field is•The lines will be closest at the polesA magnet will always have a North and South pole!•When 2 magnets are close together they will either push or pull each other•Like poles repel and opposites attract Which poles of a magnet attract? Like (North to North or South to South) Unlike (South to North) None Where on the magnet would be the strongest? The outer rings The poles The south pole only The north pole only What Causes Magnetism? •Whether a material is magnetic depends on its atoms•Electrons spinning around the outside of the atom form a small and weak magnetic field•Nickle (Ni), Cobalt (Co), and Iron (Fe) atoms will easily form in groups called domains•Thesedomains line up forming North and South Poles- THIS CREATES A MAGNET!!! What part of the atom helps to create the magnetic field? Neutrons Electrons Protons Querks _are groups of atoms lined up inside a material, which cause the material to be magnetized. Atoms Domains Lotoadams Earth's Magnetic Field •The Earth’s core is solid, but the outer core is liquid•As the Earth rotates, it causes the outer core to flow around the solid inner core•Electrical charges moving around the outside of the inner core cause a magnetic fieldThe location of Earth's geographic poles and the location of the Earth's Magnetic poles are not the same!!!Geographic North Pole is on the top of the planet, but Magnetic North Pole is on the bottom of the planet. Sketch a Picture of Earth and the magnetic field surrounding the planet. You must label:A. EarthB. Geographic North PoleC. Geographic South PoleD. Magnetic NorthE. Magnetic South Click on the correct words for the blanks below. Read it carefully!! Geographic North Pole is on the top of the planet, but Magnetic North Pole is on the bottom of the planet. Click here to learn about the affects Earth has on a compass.You will only complete the following:-START ANIMATION for experiment 1 and observe what happensThen answer the question below. Compasses Why does the needle on the compass turn as it moves around the bar magnet? It always points North no matter what. The compass contains a magnet Like poles attract The compass contains a magnet Unlike poles attract It is because of gravitational forces acting on both the bar magnet and the compass needle. Read the following article and choose the best title for the passage:Remember that a compass is a magnet and the north pole of a magnet is attracted to the south pole of a magnet. The needle of a compass is itself a magnet, and thus the north pole of the magnet always points north, except when it is near a strong magnet. This can be a little confusing since it would seem that what we call the North Pole of the Earth is actually its magnetically south pole. Since the north seeking pole of a compass always wants to point north, then the compass could be useful in helping us navigate. With a compass we can always tell which direction is north and if you know north, then you know all of the other directions. Since the north seeking pole of the compass needle is always attracted to the north, then the earth must be like a huge magnet with a magnetic pole at each end. This is exactly the case but magnetic north is slightly different from the north axis of rotation of the earth. Scientists believe that the movement of the Earth's liquid iron core and other things are responsible for the magnetic field around the earth. How the Earth's magnetic field affects a compass. How electrostaticisisty works on earth. How gravitational forces affect Earth's magnetic poles. Sort the correct scenarios under the Non-contact force that they are demonstrating. Gravitational Magnetic Electrostatic An apple falling down from a tree Iron pins attracted in the presence of a magnet bar The charging of the hair after a balloon is rubbed on a person's head Falling of raindrops on earth Two magnets are placed close to each other Small pieces of paper moving while a charged balloon is passed over top Free fall of a ball towards earth Electromagnetism A Cloth clings to your leg after taken out of the dryer Leaves falling from a tree When electric current is passed through iron converting it into an electromagnet, it attracts iron and particles towards it Packing Peanuts fly away from you every time you try and grab them as if they are repelled by Ions on your hands.