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Neglect the mass of the cord and pulleys. Problem 13-49 Block A has mass mA and is attached to a spring having a stiffness k and unstretched length l0. Determine the distance both blocks slide on the smooth surface before they begin to separate. What is their velocity at this instant? Problem 13-50 Block A has a mass mA and is attached to a spring having a stiffness k and unstretched length l0. If another block B, having a mass mB is pressed against A so that the spring deforms a distance d, show that for separation to occur it is necessary that d > 2 k g(mA+mB)/k, where k is the coefficient of kinetic friction between the blocks and the ground. Also, what is the distance the blocks slide on the surface before they separate?
calculate the maximum permissible crack size in acenter cracked panel subjected to a unifrom stress of 20 ksi. the toughness is 50 ksi"in, the yield stress is 60 ksi, w=12 inches
For a normal distribution, find the z score values that separate
what is the velocity of the cart when the bullet becomes embedded int he terget? during the firing, the man remains at the same position on the cart. neglect rolling resistance of the cart.
A stationary gas turbine power plant operates on a simple ideal Brayton cycle with air as the working fluid. The air enters the compressor at 95 kPa and 290 K and the turbine at 760 kPa and 1100 K. Heat is transferred to the air at a rate of 35,00..
The wheel of a crane lift is rolling on a flat rail. The radius of the wheel is 4 in, the contact length and force are 2.5 in and 1 ton respectively, and E = 30 MPa and ν = 0.3 for both parts. Determine (a) the maximum contact pressure, (b) the wi..
A 0,5Kg mass attached linear spring suffress 01 N/m. Determine be naturak frequency of the system in hortz e reapert this calculation for a mass of 50Kg and a suffress of 10N/m and compare your result to that of part.
An air compressor takes air from outdoors at 28deg C and 101.2kPa and compresses it to 790kPa and 50 deg C. The air input to the compressor is found to be 22.67m3/hr. Estimate the required Hp to operate the compressor.
Cracks propagate when the stress intensity factor exceeds a critical value and describe the fracture behaviour of the insulation tape loaded with a small crack.
Characterize the three basic materials (metals, ceramics and polymers) in regarding to modulus of elasticity, strength, ductility and coefficient of thermal expansion.
The compression ratio of an air-standard Otto cycle is 9.5. Prior to the isentropic compression process, the air is at 100 kPa, 17 C, and 600 cm2
A ball with a mass of 0.25 kg is thrown vertically upward with an initial velocity of 10 m/s. What is the velocity of the ball when it reaches the highest point?
Determine the power generated by the motor M at this instant if it operates with an efficiency of epsilon = 0.8.
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