El modelo de un barco de escala se va a construir en un laboratorio.

a) Determinar la velocidad a la que debe moverse el si el tiene una velocidad de

b) Determinar la fuerza de resistencia al movimiento que se producirá en el si en el

se miden

c) Calcular la potencia que debe proporcionarse a la flecha de la hélice, si la eficiencia de la misma es

del . Determinar en

datos:

1:50; a) modelo, prototipo, 19.9 yd/s; b) modelo, prototipo, 21846 kg; c) 77 %, CV

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise

The thermal expansion or contraction of a given metal is a function of the f a)-density b)-initial temperature c)- temperature difference d)- linear coefficient of thermal expansion e)- final temperature f)- original length

Amass-spring-viscous damper system of mass 3 kg has a frequency of 100 rad/s and is critically damped. its initial conditions are x(0)-3 mm and (0)-2.3 m/s. does the system overshoot its equilibrium position? prove your answer