SCIENCE QUARTER 1

Force - is defined as any push or pull, whenever our bodies move forward or when it stops, force is applied.
Applied force - applied on an object through direct pushing or pulling
Gravitational force - Force exerted by gravity, also known as weight; mass times gravity.
Normal force - Force that is perpendicular to the surface an object is in contact with, if there is no surface contact, there is no normal force.
Elastic force - force present in springs
Tension force - Force present in cables, strings, cords
Frictional force - force generated by two surfaces that contact or slide against eachother

LAWS OF MOTION

Newtons first law (Law of inertia) - states that a body at rest will continue to be at rest, and a body in constant motion will continue to be in motions along a straight line, unless acted by a net external force
Newtons Second law (Law of acceleration) - states that acceleration is directly proportional to the force and is inversely proportional to the mass. A = f/m
Newtons Third Law (law of interaction) - states that for every actions there is an equal or opposite reaction.

Uniform circular motion - motion that allows an object to follow a circular path while maintaining a constant speed.
Centripetal force - known as center-seeking force, comes from the word centri, meaning center. v2/r

LESSON 2

Work - defined as force causing the movement or displacement of an object. W = Fd J
Power - Is the rate at which work is done. WATT from JAMES WATT

REMEMBER W PT = W performant task

Potential energy - possesed by an object by victure of its position.. MGH
Kinetic energy - enegery PRESENT in moving object. ½ mv2

LESSON 3

sound - vibration that travel thorugh the air or another medium, it is produced when matter vibrated, with the vibrations traveling outwards form the source.

sound is a longitudinal wave.

Medium - a material that moved energy from one subtance to another.
Wave - can be described as a dissturbance that travels through a medium from one location to another location.

Mechanical waves - waves that require a medium for transmission.
Electromagnetic Wave - waves that do not require a medium for transmission.

Sound travels the fastest in solids and slowest in gases.

Light - an electromagnetic wave that can travel with out a medium, a natural agent that stimulates sight and makes thing visible.

Reflection - property of waves that refers back to the bouncing back of waves.
Refraction - this is the bending of light when it passes thorugh different media.
Diffraction - This is the bending of a wave when it passes through a gap or around edges
Polarization - this is the property of light wave that allows unpolarized light to vibrate or to focus in one direction or a single plane.

LESSON 4

Heat - an energy transferal that is transferred from one system to another as the result of a difference in temperature.
Temperature - it is a quantity that measures how hot or cold an object is.

once there is contact between two object of different remperatures, the energy is called heat. THERMOMETER.

0 C - freezing
100 C - boiling
32 F - Freezing
212 F - boiling

Kelvin - 0 is assigned to the absolute zero temeprature. doesnt have negative froms.