5 : 9702_s18_qp_22 : Forces, Dynamics, Density скачать в хорошем качестве

5 : 9702_s18_qp_22 : Forces, Dynamics, Density

To join our Free Trial Lesson, Join our Whatsapp Community Now! https://chat.whatsapp.com/CWSRaMi4i3w... or msg at +92 323 509 4443 To purchases recorded courses with notes https://megalecture.com/courses/ 5 A solid cylinder is lifted out of oil by a wire attached to a motor. Fig. 5.1 shows two different positions X and Y of the cylinder during the lifting process. The motor is fixed to an overhead beam. The cylinder has cross-sectional area 0.018m2, length 1.2m and weight 560N. The density of the oil is 940kgm–3 Throughout the lifting process, the cylinder moves vertically upwards with a constant velocity of 0.020ms–1. The viscous force of the oil acting on the cylinder is negligible (a) Calculate the density of the cylinder. (b) For the cylinder at position X, show that the upthrust due to the oil is 200N. (c) Calculate, for the moving cylinder at position X, (i) the tension in the wire, (ii) the power output of the motor. (d) The cylinder is raised with constant velocity from position X to position Y. (i) State and explain the variation, if any, of the power output of the motor as the cylinder is raised. Numerical values are not required. (ii) The rate of energy output of the motor is less than the rate of increase of gravitational potential energy of the cylinder. Without calculation, explain this difference. For more Video Lectures for O Levels, A Levels, IB Diploma, AP Courses & Edexcel: https://www.megalecture.com    / megalecture   For Skype/Whiteboard Subject Experts and Tutors and Free Online Trial Classes, Contact: fahad.h.ahmad@gmail.com