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Q. An airplane has a mass of 1.5×10^6, and the air flows past the lower surface of the wings at 92. If the wings have a surface area of 1400, how fast should the air flow over upper surface of the wing if the plane is to stay in the air?
Q. A 1200 kg car carrying four 81.00 kg people travels over a rough "washboard" dirt road with corrugations 4 m apart which causes the car to bounce on its spring suspension. The car bounces with maximum amplitude when its speed is 18 km/h. The car now stops, and the four people get out. By how much does the car body rise on its suspension owing to this reduce in weight?
The average intensity of sunlight at the top of the earth's atmosphere is 1390 W/m2. What is the most energy that a 30 m multiplied by 55 m solar panel might collect in one hour in this sunlight.
If the light from the spotlight strikes the mirror at an angle to the normal, what angle to the normal would you expect for the reflected rays.
.250 kg ball is dropped to the floor from a height of 1.0 m and upon rebounding, reaches a height of .60 m. What is the impulse delivered to the ball by the floor?
Assume unpolarized light of intensity 197 W/m2 falls on the polarizer in the figure, and the angle in the drawing is 37.0°. What is the light intensity reaching the photocell?
A person pulls on a 50kg desk with a 200 N force acting at a 30 degree angle above the horizontal. The desk does not budge.
An airplane is flying with a velocity of 86.0 at an angle of 23.0 above the horizontal. When the plane is a distance 114 straight above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
The speed of a passenger train is 16mph faster than the speed of a frieght train. The passenger train travels 330 miles in the same time it takes the frieght train to travel 250miles. find the speed of each train.
Compute the average linear velocity of the discus
A bicyclist of mass 75 kg ( including the bicycle) can coast down a 4.0 degree hill at a constant speed of 10 km/h. Pumping hard,the cyclist can descend the hill at a speed of 30 km/h.
Discover new angles with respect to the x-axis
What is the frictional force
A 4.80 long, 600 steel beams extends horizontally from point where it has been bolted to the framework of a new building under construction. A 75 construction worker stands at the far end of beam.
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