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Forces - Coggle Diagram
Forces
contact forces
Push
C. example- experiment 1: when a lump of Plasticine is squashed it is pushed down and changes shape.
a.) explanation
a push force is moving an object in a motion away from you, the opposite of the pull.
b.)
facts-
the harder the push the further the object goes.
if the mass of the object is larger then more force will have to be put onto the object to move it
d.)
e.)
q.1)
if the ball is hit with a great amount of force pushing it in the right direction these factors will help it go further
2.
some mechanical systems that use push are engines as the the spark explodes and pushes the cylinder in the engine down, a water up that pushes water up hill, air compressor that pushes air and a rocket that pushes something up into the atmosphere.
3.
i believe the push force is always a contact force.
the push force is unable to be a non-contact force like gravity, if something is pushed harder with ore fore then the object will travel further at a faster speed.
Friction
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b.)
facts
- anytime two objects are rubbed togther this creates friction
-
Friction is the resistance of motion when one object rubs against another. Anytime two objects rub against each other
characteristics-
the characteristics are that it is parallel to the contact surface between systems and always in a direction that opposes motion or attempted motion of the systems relative to each other.
c.)
-rubbing your hand together to create heat
-a person sliding down a slide
-walking
driving
-writing
-lighting matchsticks
d.)
Pull
-
b.)
Fact- the harder the pull the further the item you are pulling travels.
characteristics-
You can pull on an object to change its velocity. If two objects or materials are in contact one can drag the other along by friction.
attributes-
the force 'pull' helps us with things like hitching a trailer or car or pulling a door closed or opened to help us in our everyday things and life.
c.
- pulling a door closed
- hitching a car or trailer
pulling a draw open
4.
gravity itself can be a pull force as it pulling objects to the floor.
e.)
Q1. changing from a pulling to a pushing force is possible. One of the examples of this could be holding an object by a string when pushing it then pull it in a force back towards you.
- as stated before a push force can be a non contact force because of gravity. Gravity can pull and object down to the floor. for example when someone jumps out of a plane they do not stay there but they fall to the floor.
- a mechanical system that uses the force pull is the action of the elevator moving upwards using the pull force to do this.
From these questions i observed that the pull force can be easily converted from a push to a pull force and that because of gravity it can also be a non-contact force.
-
Twist
-
b.)
facts-
a force that twists something is called torsion
torsion is the twisting of the object due to the force
the twist force can change and objects shape and speed it up
characteristics and attributes-
the twist is force that makes something move in a circle and make it change shapes or speed up.
-
d.)
e.)
Questions-
steering wheel is a mechanical system using the twist force.
i believe you are able to turn a push force into a twist force as pushing down on a medicine jar the twisting it to open
I observed from this that the twist force is not used in many mechanical machines.
Normal
a.)
a normal force is the force extruded upon another object. for example if a book is resting upon another surface the surface is exerting an upward force upon the book. and preventing it from falling.
b.)
- normal forces are caused by gravity
- if there was no normal force you would slowly seep into the ground
characteristics and attributes-
The normal force is the counter force to a mass pushing against a surface. The normal force is always perpendicular to the surface.
c.)
while walking on the ground you are applying normal force to the ground
when you are traveling by vehicle the air opposes normal force
d.)
non-contact forces
Gravity
C.example- when the ball is dropped gravity causes it to fall down to the floor.
when a rock is rolled down a hill this is gravity.
a. Gravity is when everything is attracted to everything else.Gravity is everywhere around the earth attracting things to other things.
b.)
facts-
gravity is the weakest force we know
gravity is carried by something called gravitons
earths gravitational acceleration is around 9.81 m/s2
characteristics-
gravity is always attractive and never repulsive, more mass creates more gravity force, if gravity stops working the earth will fly off into space.
attributes-
gravity makes everything attracted to everything which causes us to not float from the ground. if the mass of an object is larger then the gravitational pull is stronger.
d.)
Electrostatic
c.) Example- experiment 1: when a piece of cloth or material is rubbed against a balloon it creates electrostatic forces and moves the hair upwards if put near.
a.)
Electrostatic forces are non-contact forces; they pull or push on objects without touching them. Rubbing some materials together can result in something called 'charge' being moved from one surface to the other. Charged objects pull on other uncharged objects and may either push or pull on other charged objects
b.)
facts-
rubbing materials together can create a charge
lightning is the most powerful form of static electricity
lightning is a result of rapid charge movements
Characteristics-
the characteristics of electrostatic forces are that the charge is free standing and can not be together. for example when a cloth is rubbed against a balloon and then is put towards hair the hair is trying to get away from each other. Another interesting characteristic is that electrostatic force can be either attractive or repulsive.
attributes-
- the electrostatic force can be attractive and repulsive
- it creates charge
d.)
Magnetism
c.example- experiment 1: when a magnet is put towards a piece of metal/paper clip the paper clips will attach to each other and the magnet.
-
b.)
facts- earth is a big magnet
magnets have a north and south pole
if two north poles are pushed together they will not attract to each other, this is the same as to south poles.
characteristics-
the lines of force never cross each other
magnets attract certain metal
(iron,col-bolt and nickel)
north and west sides of magnets attract each other while opposites don't.
attributes-
the attributes of magnetism is the north and south pole and the resistance formed when the same two poles are close to each other.
d.)
this shows the north and south of the magnet
from these questions I observed and learnt that the sun creates a large gravitational force on smaller planets such as earth.