HESI Physics

Speed in a specific direction

V(f)= final velocity, v(1)= initial velocity v(f) +v(1) / 2 final velocity+initial velocity/2

Distance/Time

The change in velocity over a period of time

V(f)= final velocity, v(i)= initial velocity, A(t)= change in time Velocity/Time= V(f)- v(i)/ A(t) Velocity/Time- final vel- initial vel/ change in time

V(f)= final velocity, v(i)= initial velocity a= acceleration rate, d= distance v(f) squared=v(i) squared +2ad d= 1/2a*tsquared + v(i)t v(f)=v(i) + at

9.8 m/sec squared for every second object falls

Object displaying two types of motion- horizontal and verticle (off a cliff- out and down)

D(x)= horizontal distance, v(x)= velocity t= time, x=along verticle axis d(x)= v(x)t

V(f)= final velocity, v(i)= initial velocity a= acceleration, d= distance, t= time v(f) squared= v(i) squared + 2ad d= 1/2a *tsquared + v(i)t v(f)= v(i) +at

Solve for horizontal and verticle components before solving for time

V(i)= initial velocity, v(h)= horizontal component of original velocity v(v)= vertical component of original velocity v(h)= v(i)(cos 0) v(v)= v(i)(sin 0)

#1- a body at rest will remain at rest, a body in motion will remain in motion unless acted upon by an unbalanced force. #2-an unbalanced force will cause accelerated- this acceleration is directly proportional to the unbalanced force. F=ka F= force, a= acceleration, k= constant of proportionality

The contant of proportionality (k) is equal to the mass of the object. F=ma f= force, m= mass, a= acceleration