FORCE AND MASS

• FORCE- TO PUSH OR PULL SOMETHING HAVE TO USE FORCE TO CHANGE AN OBJECT'S MOTION
• VECTOR-SHOWS MAGNITUDE AND DIRECTION

TYPES OF FORCES

• CONTACT FORCE-acts on a point of an object by direct contact
• example-kicking ball
• FIELD FORCE-the region of space surrounding a body
• example-gravitation field or a magnet

FORCE AND MASS

• MASS-measurement of how difficult it is to change the objects speed
• INERTIA-resistance to change in speed
• so mass is a measurement of an objects inertia

NEWTONS LAWS OF MOTION

An object will keep doing what it was doing unless acted on by an unbalanced force

if an object was sitting still it would stay stationary if it was moving at a constant speed it will keep moving

it takes force to change the motion of an object

EXAMPLES

A soccer ball was sitting still. it takes an unbalanced force of a kick to change its motion

Two teams are fighting over rope and their pulling the rope their putting equal force on the rope the balance of both people pulling the rope ends up not changing the motion at all

NEWTON'S FIRST LAW(LAW OF INERTIA)

Inertia-the tendency of an object to resist changes in its current state of motion. All objects have inertia. the more mass an object has the more inertia it has.

EXAMPLE OF FIRST LAW

A truck starts to pull trucks that were standing still. since the trucks were so big they have a lot of inertia so it will take a large force to change their motion. once they are moving it takes a large force to stop them

NEWTONS SECOND LAW

Force equals mass times acceleration

F=MA

acceleration-a measurement of how quickly an object is changing speed

balanced forces cause no acceleration

unbalanced forces cause acceleration

small force=small acceleration

large force= large acceleration

f=ma means that the force of an object comes from its mass and its acceleration

1 NEWTON = 1 KG M/S2

HIGH MASS

something that's changing speed very slowly like a glacier

LOW MASS

changing speed very quickly like a bullet

NEWTON'S THIRD LAW

For every action there is an equal and opposite reaction

For every force acting on an object there is an equal force acting in the opposite direction gravity is pulling you down in your seat but newtons third law says your seat is pushing you up against you with equal force that"s why you are not moving.

earth is pulled up by the boulder with as much force as the boulder is pulled by earth

newtons first law-objects in motion tend to stay in motion and objects at rest to stay at rest unless acted upon by an unbalanced force

newtons second law-force equals mass times acceleration(F=mass)

newtons third law-for every action there is an opposite reaction

SOURCES

//www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&sqi=2&ved=0ahUKEwjawNely9nRAhVJ34MKHVp8DBYQFggcMAE&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FContact_force&usg=AFQjCNHNnyl8KMptldbLv1CHEisW3dwIBA&sig2=rAJ_NFpxO126SadY9g0t-Q&bvm=bv.144686652,d.amc

http://www.dictionary.com/browse/field-of-force

https://en.wikipedia.org/wiki/Newton's_laws_of_motion

http://hyperphysics.phy-astr.gsu.edu/hbase/Newt.html