Chapter 3 Force IPS

Force

any push or pull on an object

Net force

the sum of all forces acting on an object

Unbalanced Force

causes changes in motion/velocity

The net force is _____ to 0 Newtons with a balanced force

equal

The net force is _____ to 0 Newtons when an object is unbalanced

greater than

Friction

the force that opposes the motion b/w 2 surfaces in contact

Gravity

ia an attractive force b/w any 2 objects that depends on the masses of the objects and distance b/w the objects

Weight

is the measurement of gravitational force exerted on an object’s mass

Formula for force

F=mxa

Unit for force

Newtons

formula for weight

w=mxg

unit used for weight

N

4 factors to determine friction

surface area and contact, material, texture, and how much force is applied to the object

Newton’s 1st Law of motion

an object in motion will stay in motion and an object at rest will stay at rest unless acted upon an outside force

Newton’s 2nd law of motion

The acceleration of an object depends on the mass of the object and the net force acting on an object

Newton’s 3rd law of motion

For every action force there is an equal but opposite reaction force

Inertia

the tendency of an object to resist any change an object’s motion

Air Resistence

a friction like force that opposes the motion of objects that move through the air

Terminal Velocity

is the maximum speed an object will reach when falling through a substance, such as air due to gravity

Free Fall

is when gravity is the only force acting on an object

Centripetal Force

Anything that moves in a circle is doing so because of _______ is accelerating it toward the center

Law of Conservation of Momentum

states that momentum cannot be created or destroyed so if an object with momentum collides with other objects the total momentum stays the same.

The amount of the air resistance acting on object depends on:

1.) the amount of surface area (size and shape)

2.) Velocity of an object

Factors that affect the terminal velocity of a falling object:

1.) the height at which the object is dropped from

2.) Mass of the object

3.) Surface area of object

weight

the measurement of grav. force exerted on an objects mass

Speed

the distance an object travels over time

Motion

Occurs when an object changes position

Velocity

is the speed of an object and its direction

Momentum

property of moving object that equals its mass times its velocity

Displacement

distance and direction of an objects change in position from starting point

Acceleration

The change of velocity over time

g

the acceleration of a falling object due to gravity in a vacuum (9.8m/s2)

Projectile

anything thrown or shot through the air

Average Speed

the total distance traveled divided by total time of travel

Mircowelds

where 2 surfaces are touching each other; source of friction

Physical Science

study of matter and energy

matter

anything that has volume and mass