Question one A body oscillates with simple harmonic motion along the x-axis. Its displacement varies wit time according to the equation X = (4.0 m) cos( nt+) Where t is in seconds, and the angles in the parentheses are in radians. a. Determine the amplitude, frequency and the period of the motion. b. Calculate the velocity and acceleration of the body at any time t. c. Using the results to (b),determine the position, velocity, and acceleration of the bod =Is. d. Determine the maximum speed and maximum acceleration of the body. e. Find the displacement of the body between t=0 and t= 1 s. f. What is the phase of the motion at t-2 s?.

In a wind tunnel the speed changes as the cross sectional area of the tunnel changes. if the speed in a 6' x 6' square test section is 100 mph, what was the speed upstream of the test section where the tunnel measured 20' x 20'? use conservation of mass and assume incompressible flow. conservation of mass requires that as the flow moves through a path or a duct the product of the density, velocity and cross sectional area must remain constant; i.e., that ova-constant. a model is being tested in a wind tunnel at a speed of 100 mph if the flow in the test section is at sea level standard conditions, what is the pressure at the model's stagnation point? (a) the tunnel speed is being measured by a pitot-static tube connected to a u- tube manometer. what is the reading on that manometer in inches of water? (b) at one point on the model a pressure of 2058 psf is measured. what is the local airspeed at that point?

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25? , b) el tiempo que el balón permanece en el aire.

What accounts for an increase in the temperature of a gas that is kept at constant volume? a. energy has been removed as heat from the gas. b. energy has been added as heat to the gas. c. energy has been removed as work done by the gas. d. energy has been added as work done by the gas.