Recent content by amyparker30

ok, my answers are totally wrong but for COM 1 got (2(2.5+5+2.5+5))/15 = 2 ICOM=Rotational Inertia = 2^2(2.5+5+5+2.5) = 60 i bet these are 100% wrong what should I do, my teacher wouldn't help me and the people from class just skipped this question :(

Finding COM, and inertia please help my answers don't make sense?? Homework Statement Find the center of mass of the object shown in the figure below? LINK TO FIGURE: http://s1168.photobucket.com/albums/r497/amy_parker1/?action=view&current=Untitled.jpg 1. Find the center of mass of...

thanks so much for your help!

do these answers make sense?? so F Right post= 82771.875 N and F Left post = 64378.125 N

do I calculate torque?

please!>!>!>

Homework Statement A horizontal truss, symmetric around its center, of mass 15,000 kg and total length 22m, is placed on two posts as shown in the figure Find the downward force that it exerts on each post. Homework Equations The Attempt at a Solution do i just take the force...

if this is correct,, thank you so much for you help!

so according to x3= 1/2 (-3) (83.3)^2 + (250) (83.3) my answer for leg 3 is 10416.6667m? and therefore What is the total distance traveled? = x1+x2+x3 = 625 + 750 + 10416.67 =11791.67m for total distance travelled?

okay so v3 = a*t + v which is 0= -3(because deceleration) t +250 t=83.3 seconds using equation (please IS THIS CORRECT) x3 = 1/2a*t^2 + v*t. x3= 1/2 (-3) (83.3)^2 + 0 x3= 10408.35m ?

okay for leg 1 my calculations are: v1=250 m/s x1=625m for leg 2 my calculations are: v2=v1=250m/s x2=750m i don't know how to do leg 3 but i know v3=0m/s

the values for acceleration and time are given in the question. i don't know how to calculate x3 using the equations provided?!?

I don't understand how to calculate leg3 for x3? Homework Statement A rocket sled travels along a straight line. It accelerates at 50m/s2 for 5.0s coasts for 3.0s, then deploys a braking parachute and decelerates at 3.0 m/s2 until coming to a halt. The motion occurs in three different...