Recent content by tlonster

woops, I left that out of the problem statement. from the base of the rocket, the cylinder that has the propellant is 1.5 ft. long. I just used then 7lbf for the propellant at CM of .75 ft to get the CM accociated with just the structure. Basically set up this... [7(.75) + 16x]/23 = 2.6...

Homework Statement The total length of the composite body is 4.5 feet. Before the propellant is burned, the projectile weighs 23 lbf. After the propellant burns, the remaining projectile weighs 16 lbf. Before the propellant is burned, the mass center is located 2.6 feet from the projectile...

yes, beta is a function of time. the problem statement is to find the equations of motion for the mass m hanging by a light string on an incline. both beta and theta change with time. i have already computed what the acceleration of the mass is as seen by the inertial frame. now, i need to...

Because I only have one component of all these forces acting in my Km direction, can I say that the sum of the forces in that direction is equal to zero? Therefore, my N is just zero. Can a normal force even be zero?

I'm supposed to find the equations of motion in terms of a given function beta and variable theta. the blue frame is inertial (I) and the other two frames are rotated reference frames. The frame I end up in is the green one (M) I already have the system to set up my acceleration a(M/I). Now...

Homework Statement What are the directions of my forces acting on mass m with respect to my "m" frame (see attachment)? Homework Equations some trig and transformations maybe... The Attempt at a Solution I know I only have tension, weight, and a normal force acting on my particle but I...

*distance vector magnitude "D"

I don't have any dimensions. I'm asked to find the equation of motion of the point mass, so it's actually very involved (have three reference frames now). Maybe it ends up dropping out once I get everything set up. Should I just call that distance vector "D" for now and see what happens?

Homework Statement Please see attachment. When θ = 0, mass m is at the bottom of the inclined plane. If I create a frame at origin O, with axes along the bottom of the plane and the dotted line (as shown in the picture), will my magnitude of the vector from O to A (along the dotted...