Notes in 04 Mechanics

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Status	Last Update	Fields
Published	01/09/2024	scalar quantities{{c1::magnitude only(no direction)}}
Published	01/09/2024	vector quantities{{c1::magnitude and direction}}
Published	01/09/2024	examples of scalar{{c1::length/distance}}{{c1::speed}}{{c1::mass}}{{c1::time}}{{c1::energy}}{{c1::temperature}}
Published	01/09/2024	examples of vectors{{c1::displacement}}{{c1::velocity}}{{c1::force}}{{c1::acceleration}}{{c1::momentum}}
Published	01/09/2024	ways of adding vectors together{{c1::scale drawings}}{{c1::trignometry/pythagoras (calculations)}}
Published	01/09/2024	how to find resultant vector using scale diagram{{c1::drawing scale drawing of forces "tip-to-tail"}}{{c1::measuring length and angle of resultant vec…
Published	01/09/2024	how to find resultant vector using trigonometry{{c1::perpendicular vectors → pythagoras}}{{c1::calculate angles → SOH CAH TOA}}
Published	01/09/2024	Resolving VectorsHow to find Vy and Vx{{c1::cosθ = Vx/V⇒ Vx = cosθ × V}}{{c1::sinθ = Vy/V⇒ Vy = sinθ × V}}
Published	01/09/2024	Find component of its weight that acts along the slope{{c1::resolve W → W1 and W2}}{{c1::find W1 using trigonometry i.e. W sin29°}}{{c1::}}
Published	01/09/2024	what is the reaction force of an object on an inclined slope{{c1::verticle(perpendicular to the surface) component of the weight, but acting in the op…
Published	01/09/2024	when is a body at equilibrium{{c1::all forces are balanced and cancel each other out}}{{c1::no resultant force}}
Published	01/09/2024	coplanar{{c1::lying in the same plane}}
Published	01/09/2024	what does a free-body force diagram show{{c1::all forces acting on body}}{{c1::but no the forces it exerts on the rest of the world}}
Published	01/09/2024	ways to solve equilibrium problems{{c1::force vectors in a closed loop - vector triangle}}{{c1::resolving forces in two perpendicular directions}}
Published	01/09/2024	how to solve equilibrium problems by forcing vectors in a closed loop {{c1::forces acting on object in equilibrium form closed loop if you draw t…
Published	01/09/2024	how to solve equilibrium problems by resolving forces in two perpendicular directions{{c1::resolve each force into horizontal and verticle components}…
Published	01/09/2024	mass{{c1::amount of "stuff" or matter in object}}
Published	01/09/2024	inertia{{c1::measure of object's resistance to change its velocity}}
Published	01/09/2024	what does inertia depend on {{c1::mass}}
Published	01/09/2024	weight{{c1::force experienced by mass due to gravitational field}}
Published	01/09/2024	weight formula {{c1::weight = mass × gravitional field strength (W = mg)}}
Published	01/09/2024	units of gravitational field strength(g){{c1::Nkg-1}}
Published	01/09/2024	moments{{c1::turning effect of force around a turning point}}
Published	01/09/2024	moment of force depends on {{c1::size of force}} and {{c1::perpendicular distance}}
Published	01/09/2024	formula for moment{{c1::\(M = f \times d\)}}{{c1::whereM = moment(Nm)f = force(N)d perpendicular distance(m)}}
Published	01/09/2024	principle of moments{{c1::for a body to be in equilibrium, sum of clockwise moments about any point equals sum of anticlockwise moments about the same…
Published	01/09/2024	what is perpendicular distance perpendicular between in moments{{c1::line of action for force and turning point}}
Published	01/09/2024	purpose of lever{{c1::increase distance from the pivot a force is applied, you need less force to get same moment}}
Published	01/09/2024	couples{{c1::pair of forces of equal size ·  act parallel to each other · in opposite directions}}
Published	01/09/2024	what do couples cause{{c1::doesn't cause any resultant linear force, but does produce turning effect (i.e.) a moment}}
Published	01/09/2024	formula for moment of a couple{{c1::\(M = F\times d\)}}{{c1::whereM = moments of a couple(Nm)F = size of either force(N)d = perpendicular distance bet…
Status	Last Update	Fields