An airplane has a mass of 1.9e6 kg and the air flow past the
lowersurface of the wings at 90 m/s. if the wings have surfacearea
of 1.6e3 m^3, how fast must the air over the upper surface ofthe
wing if the plane is to stay in the air. consider onlythe bernoulli
effect.

You have been called to testify as an expert witness in a trial involving a head-on collision. car a weighs 1515 lb and was traveling eastward. car b weighs 1125 lb and was traveling westward at 44.0 mph. the cars locked bumpers and slid eastward with their wheels locked for 22.5 ft before stopping. you have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750 . how fast (in miles per hour) was car a traveling just before the collision? (this problem uses english units because they would be used in a u.s. legal proceeding.)

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

Afigure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 20.9 12000 200 3.33