Question

Instructions: 1. Draw the schematic of the situation described in the wording of the problem. This schematic includes a list of the data given in the wording of the problem, such as initial position (x, yo), initial velocity Ivo, V, Vol, final position (x,y), final velocity (V, V, W) or maximum height (ym). Make a decision on whether you want to use "y" or "h" for the vertical axis and keep it consistent throughout all the problems. Write down the units. 2. On the schematic, draw the free body diagram (FBD) for each physical system (particle, block, car) that is under the actions of forces. Draw them from the Center of Mass (CM), and in the correct direction. If the forces form an angle with the axes, mark that angle. If necessary, for clarity, draw the physical system again, outside the schematic, so the FBD can be seen easily. Verify whether these forces are acting on them, and name them with the indicated abbreviation: a. Gravity (w, Fe mg): weight, always vertical and downwards. b. Normal (N): always perpendicular to the surface the system is leaning on. c Friction if Fi): always opposing the motion or the sum of all the other forces in the direction of possible motion • Static Friction (f.) • Kinetic Friction (f) d. Tension (T, Fr): always from the CM towards the rope, always parallel to the direction of the rope • A rope connecting two bodies that can be in motion means that the speeds of those two bodies are going to be the same, and the magnitude of the accelerations of those two bodies are going to is the same. • The magnitude of the Tension is the same all along the same rope. e. Spring force (Fs): always parallel to the direction of spring deformation. If the spring is stretched, from CM towards the spring. If the spring is compressed, from the CM to the opposite direction of the spring. f. Generic external force (F): pay close attention to the given figure or the wording of the problem. 3. If the wording of the problem says that the balance of forces or the state of motion changes at one point in time, then you need to redraw the schematic and FBD for the situations after and before. 4. Schematic and FBD count 40% of the problem. 5. Draw the coordinate axes. Remember that your choice of axes has to be useful. If your system is moving on an inclined plane, it's best to chose your x-axis along the surface of the plane, and your y-axis perpendicular to it. 6. Write down the 2nd Law equation for each axis separately: a. Write down, in two columns: X-axis; y-axis b. Write down the sum of all the forces, or components of forces, that act on each axis, on their corresponding column. Mind the sign of the forces, relative to the positive and negative directions of the axes you chose. c. For each axis, if the system is static in that axis, the netforce (which you have just written) is equal to zero. If the system is in motion in that axis, the net force is equal to mass times acceleration

Answer 1

Fcona ms Sno N Sn F Loo N Fcoe emg snoHN ma 200 Sn 20 t 1S9.8 xcos 2 N 20 6 53 N N 200os20- Ix.S xmao- 206 53 ISAO-2S 7.93 50 27 4206 53 3.1S 4132.98206 s3 064 38 4 4 206 53 r o-6438 x 206 3 132-98N Scanned with CS CamScanner