Recent content by Matthew M

Homework Statement A ripple tank is setup and a point selected on the second nodal line. determine the change in path length from two wave sources if they are in phase and separated by 2cm and the wave length is 5cm Homework Equations not really sure of what equations to use? The Attempt at a...

so just solving for F=MA gives me my force of friction since its in the opposite direction?

AHHH thank you i was supposed to divide! not multiply HAHA thanks for all your help, however from there how do i solve for force of kinetic friction?

Heres all my calculations F=MA F=(1)(-31.5) F=-31.5NA=ΔV/T A=(V2-V1)/T A=(0-1.4)(22.5) A=-31.5m/s2 (F) Δd=((V1+V2)/2)Δt 16 ¼ =((V1+0)/2)22.5 (16 ¼/22.5)(2)=V1 1.4 m/s (f) = V1

thats what it sounds like yes, it doesn't make much sense to me either...

V1 was calculated through the use of kinematics equations, the displacement and time are taken from a test trial. the car went 16.25 M in 22.5 seconds and V2 is zero since the car came to a stop

Hey, i checked the acceleration, i understand that is a high number, but all the numbers are correct... and yes i know it should be m/s^2 that's just a typo my bad... should I have some sort of conversion for meters --> km or is having the units in m fine? and yes the car is coming to a stop...

Homework Statement What is the force of friction on the elastic powered car as it rolls across a smooth surface? GIVENS Displacement= 16.25m, Change in time= 22.5s, G=9.8m/s, Mass= 1kg UNKNOWNS V1=?, A=? Ff=? Homework Equations F=MA, A=V/T, Change displacement=((V1+V2)/2)T) The Attempt at a...