Recent content by krisrai

Homework Statement Given the two points P(-4,-5,0) and Q(5,5,-3) find the point R that is 1/4 of the way from Q to P. Homework Equations PQ = Point Q- Point P The Attempt at a Solution I got my direction vector as PQ= [9,10,-3] but i don't know how to find R All i know is...

sorry i couldn't find the original place i posted it and it wasnt under my profile i needed to edit the question but no worries i have the answer solved if anyone wants it just msg me

State vector Proof Homework Statement 1. Prove that for any intitial state vector So= [ro po wo]T, that as long as you begin with legitimate proportions (such that ro+po+wo=1), the components of subsequent state vectors will also sum to 1. Homework Equations For example: if matrix A= [ ½ ¼...

Another Proof: subsequent vectors Homework Statement Prove that for any initial State vector S0= [r0 p0 w0] as long as you begin with legitimate proportions (such that r0+p0+w0=1), the components of subsequent state vectors will also sum to 1 Homework Equations The Attempt...

Homework Statement Prove that for any initial state vector S0= [r0 p0 w0] as long as you begin with legitamite proportions (so that r0+p0+w0=1), after a long run you get the same result as Sk= [1/4 1/2 1/4] Homework Equations Sk= b1(Lambda1)^k [X1] +...

thank you i must have multiplied the other lines wrong much:) i figured out number 3 this thread is SOLVED

Homework Statement 1. Initially, we assume the breeder’s plants are all growing in a field where they will be cross-polenated randomly, with genes that can come from anywhere (even neighbouring fields of flowers). A given plant would thus be crossed randomly, so that its offspring would...

Homework Statement A 3-kg mass starts at rest and slides a distance d down a smooth 30o incline, where it contacts an unstressed spring. It slides an additional 0.2m as it is brought momentarily to rest by compressing the spring (k=400 N/m). Find the initial separation d between the...

Homework Statement You are given matrices A: A= [-4 5 9 0 3 -5 1 3 8 -5 -6 0 4 0 -9 -1 -1 -4 3 -5] and B= [-4 5 9 0 3 -6 0 4 0 -9 -40 8 24 64 -40 -1 -1 -4 3 -5 ] Find two elementary matrices E and F that transform matrix A...

Homework Statement A particle is located at r=(2i+4j)m at t=0s. At t=3s it is at r=(8i-2j)m and has velocity v=(5i-5j)m/s a)what is the particles acceleration vector a? Homework Equations r1=r0+v0(t1-t0)+1/2a(t1-t0)^2 v1=v0+at The Attempt at a Solution v1=v0+at...

definitely helps thank you hage I just wasnt expecting that i would have to look up the coefficient of rolling friction like pingpong did.

my textbook gives the answer as 2550m

i know, if there was friction i could use ma=mgUs and find acceleration to sub into a kinematics formula to find d skidding the question oly gives what i wrote above

If a 50 000 kg locomotive is traveling at 10m/s and its brakes and engine both fail, how far will it roll before coming to a stop. Now I know how to do this problem if friction was given but I really don't know which formulas i can combine. I think I need to find deceleration but I don't...