Question

3. This is the experiment in Chapter 6. Please see the picture below. (For question 3-5.) hanging port & X SV This is a weightless meter stick (weight=0. You do not need to the count is as a force.) All the forces are perpendicular to the meter stick. The hang point A is in the middle of the stick. I have set this system in equilibrium state. Hence, we can choose any point as the axis of rotation. If we choose point B axis of rotation, please tell me how many forces and torques (non zero torque) are in the system? And how about point A? A. 3, 3 in B; 3,3 in A. B. 4, 3 in B; 4, 3 in A. C. 4, 4 in B; 4, 3 in A. D. 4, 4 in B; 4, 4 in A. 4. In this question, we choose point A as the axis of rotation. Here is the picture. All the forces in the picture I listed are magnitude of the force vector, which means they are all positive. And the distances I listed in the picture are also positive. Now, we set the clockwise rotation as the positive direction. By using which equation below, we can calculate whether this system is in equilibrium? A. F3X3 + F2X2 + F1X1 B. F3X3 - F2X2 – F1x1 C. -F3X3 + F2X2 +F1X1 D. -F3X3 - F2X2 - F1X1 5. A person made some adjustments to the system, which made it rotate clockwise around the hang point A. Can you guess what he did probably to the system? A. He added more mass on the left side of the point A. B. He added more mass on the point A exactly. C. He subtracted some mass on the right side of the point A. D. He added more mass on the right side of the point A.

Answer 1

And 3 V hanging F2 F here in this system 4 fources are there namely F F , F2, and Fz. About points, all the forces produces torque, but about hanging pt. Å, the force F doesn't produce any torque as Fitself is passing through let. A. But other 3 forces Fiu Fat Fo produces torque about A. option @ is corred. so, F and Fg produces clockwise rotation and Fo produces anto- Clockwipe rotation about point A. .. Net torque is net about point Ao - Inet. Fakat FAK, -F₂ 43 Hence, option ② is correct. Oktion 1 is correct, because only then an extra force would come which would increase positive torque and the meter stick rotates clockwise, OV Auss