Recent content by Jfxue

Displacement is the shortest distance between your initial distance and final distance. Try drawing the wolfs movement on a paper with the angles then draw a line between the initial distance and final distance that is the displacement

A= (30-0)/10 = 3m/s ^2

Since it start from standstill the initial velocity is 0m/s. the final velocity is 30m/s over a time of 10 seconds just plot those numbers in your formula and you would get your answer.

My answer would be 5 nodes 4 antinodes am I correct

Let's say I have a wave with 3 nodes and 2 antinodes if I doubled the frequency applied to the wave how many nodes and antinodes would my new wave have?

thats not a lot of stuff what you mean finding the work from the start how can u find the work from the start without knowing the vi or distance. my way isn't even long

Find the gravitational potention energy first peg=mgh=800x10x20=160000 peg equals to kinect energy at the start because it stops at k so kinect energy =1/2mvi^2 1/2(800)vi^2=160000 400vi^2=160000 vi= square root of 400 vi=20m/s power=mv=(800)(20)=16000w

ooo but other than that I am correct?

A 50 kg child running at 6.0 meter per second jumps onto a stationary 10kg sled. The sled is on a level frictionless surface. 1.FIND VELOCITY AFTER CHILD JUMPS ONTO SLED M1V1+M2V2=(M1+M2)VF 300=60VF VF=5 M/S 2.FIND KINETIC ENERGY of the sled with the child after she jumps onto the sled...