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Assuming that the hinge at A is removed and that the hinge at B can exert couples about the y and x axes. Problem 4.124: A small door having a mass of 7 kg is attached by hinges A and B to a wall and is held in the horizontal position shown by rope EFH. The rope passes around a small, frictionless pulley at F and is tied to a fixed cleat at H. Assuming that the hinge at A does not exert any axial thrust, determine
(a) The tension in the rope,
(b) The reactions at A and B.
A potters wheel is a disk of mass 3.50kg and radius .450m and is spinning freely around a vertical axis through its center with an angular speed of 14.0rad/s. what is the angular speed of the wheel+clay
A juniper-wood plank measuring 0.15 ft by 1 ft by 17 ft is totally submerged in water. What is its weight? (Ib) What is the buoyant force acting on it? (Ib) What are the size and the direction of the net force on it? (Ib)
I am standing on a 5m high platform and throw a 0.2kg ball horizontally with a speed of 10m/s. How fast will it be going when it reaches the ground
Determine the stopping distances for a car with an initial speed of 94 and human reaction time of 0.90 , for an acceleration
An electron is confined in a one-dimensional box (an infinite well). Two adjacent allowed energies of the electron are 1.068 × 10-18 J and 1.352 × 10-18 J. What is the length of the box
A soccer player kicks a ball that is on the ground down the field. The balls initial velocity is 10 m/s, 30 degrees above the horizontal. How long does is take for the ball to land down the field
Playing horseshoes the object is to throw a 1kg horse shoe a horizontal distance of 10.5 m to a vertical stake. at what angle does the shoe impact the ground
A typical nuclear power plant converts 0.01% of the mass of its fuel into energy through nuclear reactions. How much fuel would be needed to power an average city for one day
A 0.340-kg tennis racket strikes a 57.0-g tennis ball. The tennis ball has an average acceleration of 95.0 m/s2 during the collision. Find the magnitude of deceleration of the racket
Two free particles (that is, free to move) with charges +q and +4q are a distance L apart. A third charge is placed so that the entire system is in ?quilibrium. Find out the location, magnitude, and sign of the third charge.
You have just landed on Planet X. You take out a ball of mass 100g , release it from rest from a height of 15.5m and measure that it takes a time of 2.80s to reach the ground. How much does the ball weigh on the surface of Planet X
A car moving at 37 m/s approaches a stationary whistle that emits 270 Hz sound. The speed of sound is 347 m/s. What is the frequency of sound heard by the driver of the car.
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