Kinematics Flashcards
(18 cards)
Remember that when integrating each term has a constsnt it be found
Remember what to do for distance
Resolve
Remember for suvst equations for using displacment, must use what when vectors!
The CHANGE OF DISPLACMENT
When they say something like north east southeast what ti do
Make an equation carries an, we know southeast is when y=-x , but also one component must be equal to another rin directions, here the positive I = -j component and it would change a round the quadrant
Do this
How ti find an overall displacement formula
Find formula for displacment whether it be s/t etc, and add to INITAL DISPLADMENT!
When they say find accelrwtion on these vector forces what to do?
Always draw it out fully because weight might be acting roo
SAMs height as origin + what to do
Always make equation first, same height at origin is when j is 0
How to make Cartesian equation
Make x = I and y =j, eliminate t component
Remember moving 45° or whatever, moving means
MOVING MEANS VELOCITY
If curd x axis then
Set j to 0, that’s when it cuts
If never goes I direction then
If never goes I direction , then it must it must be in j
Set j to 0 to test if it goes in I, it doesn’t ,
Remember they can be travelling at a constsnt velociy which changes based in time imputed but there is also constsnt speed
Just resove
If particle what can we tell about weight and thus acceleration down slope
Most likely acceleration down a slope just due to component of gravity as particle is 0 mass
Remember at loint of Lilith g or just about ti fall
Is when reaction force is 0! (Can’t go lower than that
Don’t mes up, make simultaneous equations with tension!
On ropes and solve, don’t assume same as weight stupid
Why must we integrate to find velocity and displacement when acceleration is a FUNCTION OF TIME? Why not suvat
This is because acceleration is changing so not constant we can’t use suvat we need to find actually equations
Remember s down differntiate, a up integrate and EACH COMPONENT needs its own constant
ALWAYS FIND THE CONSTANT STRAIGHT AWAY
Rememebr the integral of the area for velocity time graoh gives the dispalcment / distance
So if don’t know what to do a DRAW A GRAPH AND INTEGRATE
In terms of work dint what does is at vs moving means
Is at = dispalcment , moving = velocity
If it refers to coordinate axis just try make equations and visualise
