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a 15 kg mass attached to a cord that is wrapped around a pulley and released from rest. the pulley has mass of 5 kg but is frictionless. consider the cord as mass less, inelastic and frictionless.
A two stage rocket with a total mass of 925kg is traveling at a speed of 6.6 10^3 m/s away from the earth . A predesigned explosion separates into two sections of equal mass that move with a speed o
If = 300 N , determine the required minimum compression in the spring so that the wedge will not move to the right. Neglect the weight of A and B. The coefficient of static friction for all contacti
An airport runway has a capacity of 60 operations (ie landing and take-offs) per hour. In a particular hour, there are 30 landings evenly spaced over the hour. During that same hour, 20 departing ai
In the Civil War there were numerous incidents in which the bullet fired from a Union soldier's rifle struck and fused with the bullet from a Confederate's rifle. Assume the impact scenario.
A pool player wants to bank ball B off of point A into the side pocket O. The ball has a diameter d = 2.25 in. and a coefficient of restitution e = 0.8 when colliding with the side of the table.
Three particles are sliding along a flat, frictionless surface. mA = 0.4 kg, mB = 0.5 kg, and mC = 0.4 kg. Before any collisions take place, vA = 15i m/s, vB = 10im/s, and vC = 5 m/s. e = 0.85 betwe
When the larger ball hits the ground and then collides with the smaller ball, it causes the small ball to bounce to a height several times greater than that from which the balls were originally rele
The force of the expanding gases on a 0.02 kg bullet is given by f=f0-f.1*t . Initially stationary at x=0 , the bullet reaches a speed of 1000 kph by the time it exits the gun. f0 = 7000 N and f1=2.
A 0.4 kg mass m is rotating on a horizontal, frictionless surface, its motion constrained by a massless, inextensible string. The distance from the string's attachment point, O, to the mass is a con
Two identical squares (each18x18mm ) sit on the x axis and are joined at the y axis to form a rectangle. What is the rectangle's product of inertia
If OA has a constant counterclockwise angular velocity of 10rad/s, calculate the angular acceleration of link AB and link BC for the position where the cordinates of A are x=-60mm and y = 80mm.
A wastewater treatment plant has two rectangular primary settling tanks, each 40 ft long, 12 ft wide, and 7 ft deep. The effulent weir length in each tank is 45 ft. The average daily wastewater flow
For a narrow horizontal rectangular beam of width b and depth h (cross section), determine a) what is the vertical shear stress distribution (tau)xy at each point y along the cross section,
Explain how medical technologies and the pharmaceutical industry are driving healthcare service demands and costs. What are the cost/benefits of this trend.
If the coefficient of static friction between the man's shoes and the pole is u=0.6, Determine the minimum coefficient of static friction required between the belt and the pole at A in order to supp
Springs AB and CD have a stiffness of k = 300 N/m and k' = 200 N/m, respectively, and both springs have an unstretched length of 600 mm. If the 2-kg smooth collar starts from rest when the springs a
In polluted areas of Texas, registered vehicles must undergo an annual emissions inspection. In Fort Bend County (near Houston), 27 vehicles failed the emissions test, from among 200 randomly select
Air at 20oC and 1atm flows at 20 m/s past the flat plate . A pitot tube placed 2mm from the wall, develops a manometer head h=16mm of Meriam red oil (SG = 0.827), measured relative to atmospheric pr
The settling velocity of alum floc is approximately 0.0014 fps in water at 10 degrees celsius. Calculate the equivalent overflow rate in gpd/ft squared. What is the minimum detention time in hours
A rectangular sedimentation basin will have a flow of 1.0 mgd using a 2:1 legth/width ratio, and overflow rate of 0.00077 fps, and a detention time of 3.0 hr. What will the dimensions of the basin b
The central conductor and the conducting tube carry equal currents of I = 1.05A in opposite directions. The currents are distributed uniformly over the cross sections of each conductor. What is the
Calculate the primary consolidation settlement for the CH layer, assuming that it is normally consolidated with a water content of 70% and a compression index of 0.25.
A Timber power-line pole is 10 in. in diameter at its base where it is solidly embedded in concrete. The pole extends 20 ft vertically upward from its base and is subjected to a horizontal pull of 3
If the allowable shear stress is 100 MPa, calculate the maximum shear force V that a W460 X 60 structural steel wide flange is capable of resisting. Use the average web shear approach.