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Science

TermDefinition
Mass How much matter is in an object
Velocity the rate of change of distance, in a specific direction
volume how much space an object occupies
density the measure of the mass of a substance per unit volume
force a push or a pull which can change an objects motion or shape
inertia the tendency of an object to remain in its current state of motion
momentum the measurement of the tendency of a moving object to remain in its current constant state of motion
All objects have... inertia
momentum is a measure of the inertia of objects in motion
mass is a measure of the inertia of stationary objects
speed up accelerate
slow down decelerate
Fa (force applied) the force applied to an object by another object
Fg (gravitational force) the force that pull object towards the centre of the Earth
W (weight) the amount of gravity pulling a mass down (measured in Newtons)
Ffr (friction) a force that opposes motion when two surfaces are in contact
Fair (air resistance) the opposing force exerted on an objected by the air
Fn (normal force) the supporting force exerted usually upward on an object that is in contact with another stable contact
Fb (buoyant force) the upward pressure exerted on an object by a fluid
F (tension force) the force transmitted through a rope, string or wire when pulled
Contact force a force applied onto another object by contact or touching *wind is a contact force*
Non-contact force a natural force- happens without contact or touching *gravity*
Velocity-time graphs What is on the left and what is on the right? Left- Velocity Right- time
Newtons first law All objects wish to maintain their current state of motion unless acted upon by an unbalanced force
net force sum of all of the forces acting on an object, taking direction into consideration
changes in motion result from... action in net forces
if an object in in constant motion it has a zero net force
3 rules about a free body diagram 1. simple object 2. arrows come from the inside 3. label arrows with forces and amount (N)
v= d/t
p= mv
Δp= mv-mu =pf-pi
Created by: s108374
 

 



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