The 20-lb block A and the 30-lb B are supported by an incline that is held in the position shown. Knowing that the coefficient of static friction is 0.15 between the two blocks and zero between block B and the incline,

Determine the displacement at Band C,and the slope at D. Assume A is fixed, B is pin-connected, and D as roller.There will be a 20 kN/m load from A to B.Draw the elastic curve of the beam. USING CONJUGATE BEAM METHOD

Situation 2 The 200-lb man walks up the inclined plank of negligible weight. The coefficients of static friction at A and B are 0.2 and 0.3, respecti В 20 ft |20° What is the reaction (Ib) at B?

The boom OAB pivots about point O, while section AB simultaneously extends from within section OA. Determine the velocity and acceleration of the center B of the pulley for the following conditions: θ = 28°, θ˙ = 3 deg/sec, θ¨ = 4 deg/sec2, l = 9 ft, l˙ = 1.8 ft/sec, l¨ = -3.8 ft/sec2. The quantities l˙ and l¨ are the first and second time derivatives, respectively, of the length l of section AB. Express your answers as vectors in the er and eθ directions.

The force P is applied to the 63-kg block when it is at rest. Determine the magnitude and direction of the friction force exerted by the surface on the block if (a) P = 0, (b) P = 187 N, and (c) P = 314 N. (d) What value of P is required to initiate motion up the incline? The static and kinetic coefficients of friction between the block and the incline are u = 0.21 and uy = 0.15, respectively. The friction force is positive if up the incline, negative if down the incline. 63 kg 19 4, = 0.21 HE = 0.15 13 Answers: (a) F= i N (b) F = i N (c) F = i N (d) P= i

Coefficient of friction is 0.30. A homogeneous block weighs W rests upon the incline as indicated. Determine the highest height at which a force P parallel to the incline could be applied so that the block will slide up the incline without tipping over. Show FBD drawing of block and forces

Determine the smallest horizontal force P (in N) required to move the wedge. The coefficient of static friction at all contacting surface is 0.3 and the angle theta is 20 degrees. neglect the weight of the wedge. If the horizontal force P is removed, determine the largest angle theta (in degrees) that will cause the wedge to be self-locking regardless of the magnitude force applied to the handle. The coefficient of static friction at all contacting surface is 0.3.

Identify all the forces applied in the FBD. show complete FBD and solution

The 2.5-Mg car is being towed by a winch. If the winch exerts a force of T = 132.2(s + 1) N on the cable, where s is the displacement of the car in meters, determine the speed of the car in m/s when s = 11 m, starting from rest. Neglect rolling resistance of the car.