The crate shown in Figure P2 has a mass of 50 ?? and the coefficients of static and kinetic friction between it and the inclined plane are 0.3 and 0.25, respectively. The angle of the plane is 45?. (a) What tension must the winch exert on the cable to start the stationary crate sliding up the plane? (b) If the tension is maintained at the value determined in part (a), what is the magnitude of the crate’s velocity when it has moved 0.5 ? up the plane?

The crate shown in Figure P2 has a mass of 50 ?? and the coefficients of static and kinetic friction between it and the inclined plane are 0.3 and 0.25, respectively. The angle of the plane is 45?. (a) What tension must the winch exert on the cable to start the stationary crate sliding up the plane? (b) If the tension is maintained at the value determined in part (a), what is the magnitude of the crate’s velocity when it has moved 0.5 ? up the plane?

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.50P: The block of weight W is pulled by the force P inclined at the angle to the horizontal. Find the...

See similar textbooks

Similar questions

You construct a version of the cart and bucket, but with a slope whose angle can be adjusted. You use a cart of mass 167 kg and a bucket of mass 57.0 kg. The cable has negligible mass, and there is no friction. What must be the angle of the slope so that the cart moves downhill at a constant speed and the bucket moves upward at the same constant speed? With this choice of angle, what will be the tension in the cable?
Figure Q3(b) shows two boxes, A and B hold each other on the ramp. If box A weigh X kg and the coefficient of friction between box A and the ramp are, μs = U and μk = G, determine the range of weights of the box B will the system remain stationary U =0.27 G=0.23 X=55kg
An 8 ?? box resting on a horizontal, frictionless surface is attached to a 2 ?? weight by a thin, light wire that passes over a frictionless pulley. The pulley has the shape of a uniform solid disk of mass 2 ?? and diameter 0.6 ?. After the system is released, find (a) the tension in the wire on both sides of the pulley, (b) acceleration of the box, (c) horizontal and vertical components of the force that the axle exerts on the pulley.
A large box of mass m sits on a horizontal floor. You attach a lightweight rope to this box, hold the rope at an angle u above the horizontal, and pull. You find that the minimum tension you can apply to the rope in order to make the box start moving is Tmin. Find the coefficient of static friction between the floor and the box.
Consider the figure shown in Figure E5.33. You are lowering two boxes, one on top of the other, down a ramp by pulling on a rope parallel to the surface of the ramp. Both blocks move with constant velocity of 15.0 [m/s]. The coefficient of kinetic friction between the ramp and the lower box is 0.444 and the coefficient of static friction between the two boxes is 0.800. a. Draw the Free-Body diagram of both blocks. Set the x axis parallel to the ramp.b. Write the x and y components of 2nd law for both blocks considering their state of motion (accelerations).c. What are the magnitude and direction of the frictional force on the upper box?
Three masses are attached to a uniform meter stick, as shown in figure. The mass of the meter stick is 150.0 g and the masses to the left of the fulcrum are m1 = 50 kg, m2 = 75 kg, and m3 that balances the system when it is attached at the right end of the sticky, and the normal reaction force at the fulcrum when the system is balanced. Also, find the mass m3.
The mass of Block(A) in Fig. below is( 6 kg ).The coefficient of friction between the block and the surface on which it rests is (0.25) .The weight (w) is (12N) and the system is in Equilibrium.(a)Find the friction force exerted on Block( A).//(b) Find the maximum weight of (W) for which the system will remain in Equilibrium
A uniform wheel of 60 cm dia. and weighing 1000 N rests against a rectangular block 15 cm high lying on a horizontal plane as shown in figure. It is to be pulled over the block by a horizontal force P applied to the end of a string wound round the circumference of the wheel. Find the force P when the wheel is just about to roll over the block.
Can the system in given figure bein static equilibrium in the positionshown?The uniform bar AB weighs 500 lb,and the weight of block C is 300 lb.Friction at A is negligible, and thecoefficient of static friction is 0.4 atthe other two contact surfaces.
An engineer trying to determine whether her crane will tip over when attempting to lift a 13K load. Her crane has a 15K chassis and 35K counterweight. Assume all other parts of the crane have negligible weight. Answer all questions relative to the rotation point. How much torque is caused by the load? How much torque is caused by the chassis? How much torque is caused by the counterweight? What is the normal force on the rear (right) outriggers? What is the normal force on the front (left) outriggers? *each box in picture = 5 ft
A pile-driver hammer has a mass of 300 kg and is to be raised 16 m in 4 sec. The total friction on the guides is constant at 400 N. What constant pull must be exerted on the cable?
A Volkswagen Bug weighing 3,045 lb is design with a wheelbase of 100.1 in has a center ofgravity that is 17 in above the pavement and 25 in behind the front axle. If the car is on aroadway with packed snow or ice, what is the maximum tractive effort that can be developed ifthe car is (a) front-wheel drive or (b) rear-wheel drive?