Un cuerpo de 40 kg de masa se mueve hacia arriba en un plano inclinado de 30º con respecto a la horizontal. sobre el cuerpo actúan las siguientes fuerzas: una fuerza horizontal de 120 n, una fuerza paralela al plano de 200 n favoreciendo el movimiento, una fuerza de fricción de 50 n que se opone al movimiento. el cuerpo se traslada 40 m a lo largo del plano inclinado a velocidad constante. calcular el trabajo de cada fuerza y el trabajo total.

If a simple machine reduces the strength of a force, what must be increased?

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.

Aleaky 10-kg bucket is lifted from the ground to a height of 15 m at a constant speed with a rope that weighs 0.7 kg/m. initially the bucket contains 45 kg of water, but the water leaks at a constant rate and finishes draining just as the bucket reaches the 15-m level. find the work done. (use 9.8 m/s2 for g.) show how to approximate the required work by a riemann sum. (let x be the height in meters above the ground. enter xi* as xi.) lim n → ∞ n (9.8)(45−3 xi) i = 1 δx express the work as an integral. 0 dx evaluate the integral. (round your answer to the nearest integer.) j