How many degrees of freedom are restrained by a sliding contact as shown in the figure, where a block slides along a frictionless surface? 1 Don't Know 3 4
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- There is a box with height 1.2 m, width 0.8 m and mass 50 kg. It contains a very expensive equipment, which cannot be tilted while moving. There is a rope connected to the top-right corner of the box that you can pull with. The static friction coefficient between the floor and the box is 0.4. Assuming the rope angle θ is 30 degrees and m/s2. a) Is it possible to move the box using the rope without tilting the box? (need to show details) b) What is the minimum force required to move the box on the floor?A block P of weight 50 N is kept on a plane and now pulled so that the extension in the spring is 10 cm. The stiffness of the spring is 4 N/cm and the coefficient of friction between the block and the plane is μ = 0.3. Find the maximum compression in the spring.A horizontal force P acts on the top of the 30 N block having a width of 25 cm and a height of 50 cm. If the coefficient of friction between the block and the plane is 0.33. a. What is the value of P for motion to impend? b. Is the motion will impend due to overturning? Show your solution.
- Two weights are hung over two frictionless pulleys that are connected by a wire rope to a 500 Ib horizontal block that are in between and below them. The wire rope attached to the upper left end of the block and to the left pulley is at 45 degrees with the horizontal and the wire rope that connects the upper right end of the block to the right pulley is at 30 degrees with the horizontal. If the weight on the left pulley is 50 lb, fs= 0.30 and fk = 0.20 on the surface of block what weight W on the right pulley will cause the 500 lb block to just start moving to the right? *The thin ( 3 mm ) thick plastic panel shown in the figure is lowered from a ship to a construction site on the ocean floor. The plastic panel weighs ( 200 N ) in air and is lowered at a rate of ( 2 m/s ). Assuming the panel remains vertically oriented, calculate the tension force in the cable. Take ( ρ = 1000 kg/m3, ν = 1.31 * 10-6 m2/s ), and use; CDlam = 1.328 / ReL 1/2 CDturb = 0.072 / ReL 1/5 .In order to burgle a local McDonald's, the Hamburglar must climb onto the roof. To do this, a ladder of length 3.31 m and mass 21.2 kg is placed leaning against a vertical wall, as shown in the image below. There is negligible friction between the ladder and the wall, but the same is not true for the ladder and the ground: us ≠ 0 between those two surfaces. Even with that friction, the ladder will start slipping if the angle ø ladder makes relative to the ground is less than 71.0°. Assuming the ladder is uniform (so that its center of gravity is located at its geometric center), what must be the maximum static frictional force (in N) that exists between the bottom of the ladder and the ground? Explain how you solved the problem involving a ladder leaning against a wall. Be sure to state what your known and unknown quantities are, what concepts were applied, and what equations were used!
- A uniform ladder stands on a rough floor and rests against a frictionless wall as shown in the figure. Since the floor is rough, it exerts both a normal force N1 and a frictional force f1 on the ladder. However, since the wall is frictionless, it exerts only a normal force N2 on the ladder. The ladder has a length of L = 4.0 m, a weight of WL = 69.0 N, and rests against the wall a distance d = 3.75 m above the floor. If a person with a mass of m = 90 kg is standing on the ladder, determine the following. (a) the forces exerted on the ladder when the person is halfway up the ladder (Enter the magnitude only.) N1 = N N2 = N f1 = N (b) the forces exerted on the ladder when the person is three-fourths of the way up the ladder (Enter the magnitude only.) N1 = N N2 = N f1 = N** Please label the question answers so I could understand it better! Thank you! Scenario: A chair with a mass of 20.0 kg is attached to one end of a frictionless pulley system via a strong massless rope. The other end of the rope is attached to a steel water tank sitting on a flat horizontal concrete surface (see the image to the right). The coefficient of static friction between steel and concrete is 0.45 and the coefficient of kinetic friction between the surfaces is 0.30. The water tank, which is full of water, has sprung a leak. The combined mass of the water and the tank is 500 kg. This mass slowly decreases as the water leaks from the hole. You (i.e. your entire mass) are sitting at rest in the seat. You and the seat will remain at rest as long as the force of static friction is strong enough to hold you. Task: LET [DOWN] and [RIGHT] be positive. Using your knowledge of physics, determine the following: 1. As soon as the chair begins to move, static friction between the steel…Q2. A mechanic is lifting a car of 2000kg using a screw jack as he applies a force of 100 N. The screw jack handle is 600 mm, and the screw pitch is 10 mm.Calculate the following; Mechanical advantage Velocity ratio Efficiency
- Q2. A mechanic is lifting a car of 2000kg using a screw jack as he applies a force of 100 N. The screw jack handle is 600 mm, and the screw pitch is 10 mm. Calculate the following; Mechanical advantage Velocity ratio EfficiencyIn a belt arrangement two pulleys are connected by flat belts having same diameters. Themaximum force on the tight side of belt is 662 N. If co-efficient of friction is 0.3 thenwhat is maximum force on the slack side of the belts?two boxes each of weight 75lb are stacked as shown in the figure .If the coefficient of static friction between the boxes is ps =0.8 and between the box anf floor is us =0.5,Find the minimum force P to cause motion.