Question

Choosing the coordinate axes to use is often one of the more difficult choices to make when doing force problems. Almost always the best choice is to choose a coordinate system which is parallel and perpendicular to the net acceleration. For each of the two below situations draw acceleration and FBD diagrams, indicate the direction of the x- and y- axes, and then write the two Newton's law equations. Note: even if the coordinate system rotates you should NEVER rotate the picture or diagrams (i.e. gravity should always point straight down!) 3. A sled (mass M) is pulled along frictionless ground with tension Tat angle relative to the ground Picture: FBD AccD Axes?? Equations: Fx - Max -Ma,- Note that the point here is to read the equation off of the diagrams, so aligning the equation below the diagram helps make this process clear)

Help

Answer 1

Now take component of Tension Apply Newton's 2nd Law in X. F_X = ma_X T cos theta = ma_x Apply Newton's 2nd Law in Y F_Y = ma_y N + T sin theta - M_g = ma_y