(a) Draw the FBD of A and B when the wedge B impends to slide to the left. Friction is negligible except for the surface under B whose coefficient of friction is 0.20. (b) Determine the magnitude of P to start the wedge B to slide to the left. 30 120 lb 80 lb
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- The blocks A and B of weights WA and WB are joined by a rope that passes over the fixed peg C. The coefficients of static friction are =0.2 between block A and the inclined plane, and =0.25 between the rope and the peg. Determine the range of Wb/WA for which the system will be in equilibrium.(a) Draw the FBD of wedge B and block A when wedge B impends to slide to the right. Friction is negligible except for the contact surfaces between B and the horizontal plane B whose coefficient of friction is 0.20. (b) Determine P to impend the wedge B to slide to the right.3. A vehicle, mass 1400 kg, passes a bend at a speed of 54 km/hr. The radius of curvature of the road is 60 m. Determine the minimum coefficient of static friction between the car tires and the road, so that the car can pass through corners safely.
- Three packages each of weight m = 9 kg A, B, and C are placed on a conveyor belt that is at rest. Between the belt and both packages A and C, the coefficients of friction are Ms = 0.30 and Mk = 0.20; between package B and the belt, the coefficients are Ms = 0.10 and Mk = 0.08. The packages are placed on the belt so that they are in contact with each other and at rest. Determine which, if any, of the packages will move and the friction force acting on each package. The frictional force acting on A is N The frictional force acting on B is N The frictional force acting on C is N Note: please show correct step by step working out. And double check final answers. Also for frictional force A, B & C show their directions as well. Thanks!A 50 kN load is placed on two tires of a locked-wheel trailer. At a speed of 48 km/h, a force of 30 kN is required to move the device. Determine the friction factorTo climb a 400 meter high mountain, you have two options, a straight line route with a 40 ° slope or a route composed of 5 equal sections (same length) each with a 20 ° slope. If traveling in a car with a mass of 1280 kg and a maximum power of 88 kW, Determine (assume the whole car as a particle): a) Is the friction enough to prevent the car from sliding? The coefficient of static friction of the tires with the ground is 0.95. b) What is the power required to climb the 40 ° slope at a constant speed of 40 km / h? Does the car have enough power to go up at that speed? c) What is the constant speed at which the 40 ° slope can be climbed with a 60 kW power? d) What is the power required to climb a 20 ° slope at 40 km/h? Does the car has enough power to go up at that speed? e) In which of the two trajectories does the car do more work? Ignore the resistance of the air and rolling resistance and radius of curves between sections of the compound route. Please add the free body diagram.
- the system blocks shown below is in equilibrium, the weight of block A is 10 kN and for block B is 35 kN . The coefficient of friction between A and surface is 0.2 and between two block A and B is 0.15. Answer the following: The direction of friction force between two blocks which effect on block A is in * First Quarter Second Quarter Third Quarter Fourth Quarter The value of friction force between two blocks is * 5.6 kN 6.4 kN 4.8 kN Non above-mentioned The value of friction force between block A and its surface is * 4.0 kN 5.5 kN 6.2 kN Non above-mentioned The coefficient of friction between block B and surface is * 5 نقاط 0.24 0.63 0.56 0.37 The value of friction force between the block B and it's surface is * 25 kN 35 kN 15 kN Non above-mentioned The system is in * Equilibrium Impending to motion KinematicA system of blocks is pulled by a force P. The string connecting blocks A and B passes over apulley whose coefficient of friction between string and pulley is 0.25. The coefficient of frictionbetween surface and blocks is 0.20. Block A weighs 200N and block B weighs 300N. Determine,a. the minimum value of P for impending motion to the right.b. the tension connecting block B.Determine the horizontal force required to move a 2500-lb automobile with 23-in.-diameter tires along a horizontal road at a constant speed. Neglect all forms of friction except rolling resistance, and assume the coefficient of rolling resistance to be 0.05 in.
- A car weighing W1 starts moving from the point A of the inclined plane that makes an angle α with the horizontal, hitting the block B, which is at a distance of ℓ, and move smoothly. Since the kinematic friction coefficient µk between the block B and the inclined plane is µk, find the “X” distance where the car and block will stop. W1=W2; ℓ=10 m; µk=0.5; α= 12°Six 5 N blocks are stacked vertically. The coefficient of static friction between the blocks is µs = 0.20. Determine the horizontal force that must be applied to the fifth block from the top of the stack, in order to slide it out without moving the other blocks.A box of mass m = 30 kg is at rest on a ramp inclinedat 50° to the horizontal. The coefficients of friction between the box and the ramp are mS = 0.80 and mK = 0.70. Determine the magnitude of the largest force that can be applied upward, parallel to the ramp, if the box is to remain at rest.