Mechanics Flashcards
projectile motion
horizonal
X = Ux t
X is height
project8ile motion
total time
add horizontal and vertical
projectile motion
Ux
Uy
cos
sin
U x 3/2
projecti9le motion
vectors
horizonta lthen vertical
u=(32.1i+13.2j)
speed at the stone before it hits the ground
magnitide of velocity vector
sqare root and square
Vertical motion
Changes
Horizontal motioj
Never changes
Constant velocity
No acceleration
When constant speed
Opposite forces equal each other as equal to 0
How to draw triangle
Right anger opposite hypothenuse
Right anger opposite hypothenuse
Inextensible
Can’t stretch
suvat
s: displacment
u : initial velocity
v: final velocity
a: acceleration
t: time
The maximum value of the frictional force FMAX = λR is reached when the body you are considering is on the point of moving. The body is then said to be in limiting equilibrium.
= In general, the force of friction F is such that F < λR, and the direction of the frictional force is opposite to the direction in which the body would move if the frictional force were absent.
on the point of slipping means
object is at limiting equillibrium
forces
State what modelling assumptions you have made.
The assumption is that the crate and books may be modelled as a particle.
sva
use differentiation to find v and a given s
sketch quadratics and cubics to solve maximum and minimum problems
when cant you use suvat
variable acceleration, only constant
speed
magnitude of vector
never use in 2D
v^2=u^2+2as
Speed of particle before it hit the floor
Speed = square roots of hor velocity squared plus vertical velocity squared (v)
position vector
displacement
find the speed of (vector velocity)
square root of squared
