Question Solved1 Answer m2 592 The three blocks shown (10.0 kg, 5.0 kg, and 3.0 kg. respectively) are connected by massless strings that pass over frictionless pulleys. The acceleration of the system is 2.35 m/s to the left and the surfaces are rough. Find a) the tensions in the strings and b) the coefficient of kinetic friction between blocks and surfaces (assume u is same for both blocks) ms 3.0 kg mi 10 kg 0=25

Part A Find the electric flux Φ1 through surface 1 shown in Figure 1. Express your answers in newton meters squared per coulomb to two significant figures. Part B Find the electric flux Φ2 through surface 2 shown in Figure 1. Express your answers in newton meters squared per coulomb to two significant figures. Figure 1: 4.0m E (3) 400 NIC 2.0 m 4 2 30° 5

A box weighing 100 N made of Copper is pushed on a horizontal surface made of steel. Using the information given in the Table shown bellow, the minimum force needed to start the box skidding on this surface is Coefficients of Friction a) 36 N c) 53 N e) +5 N b) +7 N d) 7+ N Steel steel Shuninunon steel Copper om te Balkon concrete mwand 0.37 03.17 0. 1. 11. We won wetu W dni Icon Select one

A post-tensioned bonded concrete beam has a prestress of 1560 kN in the steel immediately after prestressing which eventually reduces to 1330 KN. The beam carries two live loads of 45 kN each in addition to its own weight of 4.40 kN/m. a) Compute the extreme fiber stresses at mid-span under the initial condition with full prestress and no live load b) time dependent losses assume all need data) c) Compute the extreme fiber stresses at mid-span under final condition after all the losses have taken place and with full live load. 45kN 45kN 4.50m 3.00m 4.50m 300 009 GP. Ancog 1 1 1 1 1 1 1 1175 Mid span section

med attempt.phplattempt=629918 cmid=76370&page=2 A box weighing 200 N made of steel is pushed on a horizontal surface made of steel.Using the information given in the Table shown bellow, the minimum force needed to start the box skidding on this surface is Coefficients of Friction Pus a) 80 N c) 122 N e) 114N b) 188 N Steel on steel d) 148 N Copper on steel Aluminum on steel 0.74 0.61 0.53 1.0 0.25-0.5 0.94 0.14 0.57 0.47 0.36 0.8 0.2 0.4 0.1 Rubber on concrete Wood on wood Glass on glass Waxed wood on wet snow Waxed wood on dry snow Melal on metal (lubricated) Ice on ice Teflon on Tellon Synovial joints in humans 0.04 015 0106 0.09 101 0.04 0.01 0.04 0.009

(1 point) Determine the truth value of the following statements if the universe of discourse of each variable is the set of real numbers. Enter your answer as T or F. 1. Ex3y (x + y y + x) 2. Vx + 03y (xy = 1) 3. Ex3y ((x + 2y = 2) ^ (2x + 4y = 5)) 4. ExVy + 0 (xy = 1) 5. Vxay (x² = y) 6. Vx3y (x = y² ) 7. Vx3y (x + y = 1) 8. ExVy (xy = 0) x+y 2 = z)AAZEXA '6 10. 3x (x = -1) 11. Vx3y ((x + y = 2) ^ (2x – y = 1)) 12. 3x (x2 = 2)

Q: One ball is dropped at rest from a height of h = 55 m. At the same time, another ball is thrown upward from the ground with initial velocity v2 = 25 m/s. It takes Δt time for them to meet on the way. a) Defining the positive direction going upward, what is the acceleration of the two balls, a in m/s2? b) Express the displacement of the ball falling down, Δy1, when the two balls meet in terms of Δt and a. c) Express the displacement of the ball going upward, Δy2, when the two balls meet in terms of v2, a, and Δt. d) Express h in terms of Δy1 and Δy2. e) Express Δt in terms of h and v2. f) Calculate the numerical value of Δt, in seconds. g) Calculate the numerical value of Δy2, in meters, which represents the height at which the two balls meet. Any help is appreciated!