1- The internal force of the spring is Select one: a. 228.15 b. 386.10 c. 292.50 d. 473.85 e. 93.60 2- Tension in BC is Select one: a. 588.49 b. 177.25 c. 411.23 d. 216.25 e. 641.66 3- Tension in BD is Select one: a. 484.52 b. 275.68 c. 45.95 d. 547.17 e. 208.84 4- If maximum tension in cables does not exceed 975 N, the corresponding spring constant is  (N/m) Select one: a. 1456.00 b. 4550.00 c. 3549.00 d. 6006.00 e. 7371.00

Subject: Eng. Mech. Dynamics I Tutorial Sheet 5 University of Babylon Kinetics of particles "Work and Energy" Class: 2nd College of Engineering/Al-Musayab Lecturer: Mushrek A. Mahdi 30 Q1: The spring is undeformed (unstretched) when x = 0. If the body moves from the initial position x, = 100 mm to the final position x2 = 200 mm, determine: 2 lb 15 1- The work done by the spring on the body 2- The work done on the body by its weight. [ Ans.: U, = -60 J, Uw = 2.35 J] Q4: The system is released from rest with no slack in the cable and with the spring 4 kN/m www unstretched. Determine the distanced s traveled by the 10-kg cart before it comes to rest (a) if m approaches zero and (b) if m = 2 kg Assume no mechanical interference 7 kg [ Ans.: (a) s = 0. 663 m, (b) s = 0.349 m] 20 10 kg 25 Q2: The 64.4-lb crate slides down the curved path in the vertical plane. If the crate has a velocity of 3 ft/sec down the incline at A and a velocity of 25 ft/sec at B, compute the work U, done on the crate…

Qno1 must solve. okk qno2 aslo please solve.

Problem 9.2 A 1200 kg mass is hanging from a small pulley that is free to roll on the cable (frictionless, of course). The length of the cable BC is 18 m. Determine the horizontal force (i.e., P) that would hold the pulley in equilibrium in the position at x = 5 m. Use COLM principles to solve. You must draw a KD and a FBD for this closed, steady state (i.e., equilibrium) system. Hint: Use LBC and geometry to find the angles of AB and BC (relative to Pulley B). 2 m T 16 m- 1200 kg Ans: 1400 N ≤ P ≤ 1700 N