Physics Year 10

Scalar

¡Quantities where only the magnitude (size) is important. E.g. distance, speed, time

Quantities where both magnitude (size) and relevant direction is needed, ex displacement

distance

¡Is the cumulative length an object travels measured in meters (m)

displacement

¡Is the straight line distance between an objects initial and final position. Needs a direction and is measured in meters.

Velocity IN M/S

¡ is a measure of how quickly an object is moving in a particular direction. It is measured in km/h or m/s plus a direction where ¡= x/t   

¡where x = displacement and t = total time taken

speed

¡Speed is a measure of how quickly an object is moving. It is measured in km/h or m/s

¡Speed = total distance travelled          S=D/T

¡                  total time taken

acceleration

the rate of change of velocity

Acle= Final- Initial velocity/ time taken

forces

The action of one object (a push or a pull) on another object causing an object to accelerate deaccelerate change direction or changed shape Measured Newton (N) units for force

FR

Force of resistance

FA

Force applied

FG

Force of gravitational pull

Labelling Force Diagrams

should be labelled force OF___ ON ____

FT

Force of Tension

FN

Normal Force reaction

FB

Force of buoyancy

Net Force

The overall force acting on an object, calculated as the vector sum of all individual forces acting on it.

Gravity

the force that attracts a body towards the center of earth or towards any other physical body having mass

mass

the quantity of matter which a body has units of kilograms or grams. Same at places and is scalar

weight

The force exerted on the mass of a body by a gravitational force. Differs from gravitational force and is vector

weight formula

Weight= mass times gravity

Newtons 1st law

An object will remain in a constant state of motion unless acted upon an unbalanced force.

Force formula

F= M x G

Unbalanced Forces

forces acting on an object where the net force is not zero

Vertical plane use sin

Vertical plane use sin

Horizontal plane use cos

Horizontal plane use cos

Net Force

Net force is the sum of all forces acting on an object in an certain direction (newtons)

Final Velocity formula

v = u + at ( UNITS M/S)

Newtons 2nd Law

The acceleration of an object is proportional to the net force applied and inversely proportional to the mass of the object. F=MA

F=MA

2nd Law force= mass times acceleration

instantaneous values

values in motion and forces refer to the values of velocity, acceleration, and force at a specific point in time, rather than over a period. 

Contact Forces

Forces that require one object to touch another one

Non Contact Forces

Forces that act without the need for objects touching

3 types of non contact forces

Gravitational Force

Magnetic Forces

Electrostatic Forces

Gravitational Force

the force of attraction between all masses in the universe

Magnetic Forces

is the force of a magnet pulling on some metallic objects.

Electrostatic Forces

is a force exerted between electrically charged objects

Weight Formula

W= mass times gravity

Component Forces

the individual parts of a single force vector, broken down into two or more directions, often the x and y axes, that together have the same effect as the original force. 

Net force for X or Y

cos is used to find horizontal net force while sin is for vertical (NEWTONS unit)

Acceleration formula

A= (V Final - V Intial / Time

VELOCITY IS ALWAYS GIVEN WITH A DIRECTION

VELOCITY IS ALWAYS GIVEN WITH A DIRECTION