124 km/h winds slam head-on into a building 49 meters wide and 71 meters high, bringing the material down. Calculate the average wind force on the building if air has a mass of 1.3 kg per cubic meter. Use two significant figures and the proper units to express your solution.

Q: An elevator has a height of 8 feet [ft], and a square floor area of 6 feet [ft] wide by 6 feet [ft]…

A:

Q: In downhill speed skiing a skier is retarded by both the air drag force on the body and the kinetic…

A: (a)  It is known that, both air friction and kinetic friction force are acting opposite the…

Q: bottom of a car hits a sharp rock, which punctures a small hole on the bottom of its gas tank. If…

A: Given h = 30 cm = 0.3 m

Q: Scenario: A chair with a mass of 20.0 kg is attached to one end of a frictionless pulley system via…

A:

Q: Why is it preferable for airplanes to take off into the wind rather than with the wind?

A: With air flowing over the wing, the airplane additionally helps to lift so that it can become…

Q: The H20 at the bottom of a waterfalls has a speed of 40 m/s. The height of the water falls is 22.7…

A: Velocity of water at the bottom of a waterfalls, vb = 40 m/s. Height of waterfalls, ht = 22.7 m.…

Q: One of the predicted problems due to global warming is that ice in the polar ice caps will melt and…

A:

Q: For an aeroplane with velocity 120 m/s, wing area 24 m?, a drag coefficient 0.08 and a lift…

A: Given, Velocity of Aeroplan v = 120 m/s Wing Area A  = 24 m2  Drag coefficient CD = 0.08 Lift…

Q: Why do roofs of small houses blow off by strong winds during a stormy weather?

A: Note: Since you have posted multiple different question. Due to company guidelines it is our…

Q: A boy stands on the back of a rowboat and dives into thewater. What happens to the boat as he leaves…

A: A boy dives into water

Q: Underwater, you can just barely lift a 75.0 kg rock (density 3.20 g/cm3 ). How massive a rock could…

A:

Q: The force of the atmosphere at sea level against the outside of a 10-m2 store window is about a…

A: The air inside the store is also exerting a million Newton of force on the inside of the window.…

Q: water tank pulley water leak you

A:

Q: A heavy bucket with an empty mass of 4 Kg is filled with 5 Kg of liquid. The bucket is pull up from…

A:

Q: Scenario: A chair with a mass of 20.0 kg is attached to one end of a frictionless pulley system via…

A: Let, Mass of the chair: m1=20.0 kgMass of the man: m2=55.7 kgTotal mass of the tank+water, M=500…

Q: At what speed will the velocity head of stream of water be 50 cm? Use g= 10m//s^(2).

A:

Q: The windows of an office building are 4.26 m by 5.26 m. On a stormy day, air is blowing at 28.0 mps…

A: Given:-  The windows of an office building are 4.26 m by 5.26 m.  air speed = 28 m/s   a window on…

Q: Which has a longer mean free path, liquid water or water vapor in the air?

A: Mean free path is the average distance traveled by the molecules between subsequent collisions.…

Q: When a body is moved from sea level to the top of a mountain, what changes occur in the body? Is it…

A: The mass of an object is a measure of the object's inertial property or the amount of matter it…

Q: Why do airplanes normally take off facing the wind?

A:

Q: A storage shed has a flat roof 4 meters long and 3 meters wide. A hurricane force wind blows across…

A:

Q: Why is a slight blow on a cork of bottle fully filled with a liquid sufficient to break the bottle?

A: Answer :Increase in pressure increases the velocity of molecules

Q: A block of ice of mass 150 kg is floating in a fresh-water lake. The den: 1000 kg m. Determine (i)…

A: Hi, when the object is immersed in fluid partially two forces will act on it. One will be the weight…

Q: A large stone is resting on the bottom of the swimming pool. The normal force of the bottom of the…

A: Due to the buoyant force, density is calculated by the measuring of weight and apparent  weight,…

Q: one end of a frictionless pulley system via a strong massless rope. The other end of the rope is…

A:

Q: A wind turbine has following data: Blade Length I = 50 m, Wind Speed v = 16 m/s and Air Density =…

A: Given Blade length = 50m Area = πr2 = π(25m)2 = 1963.5m2 Speed = 16m/s Air density = 1.225 kg/m3

Q: 8) Calculate the terminal velocity of a 10 µm gold particle (p=15.6 g/cm) in water (p'=1.00 g/cm;…

A:

Q: If the force of the fan pushes the air backwards with 150 N, what is the forward force of the air on…

A: Force of air on the boat is the thrust force applied by the air on the surface of boat in…

Q: Concrete dams are built to be much thicker at the bottom than at the top. Which of the following is…

A:

Q: Callie is running a 400 m race around a 400 m track. On the backstretch her velocity is 8 m/s, but…

A:

Q: Consider an object falling through air, where p, is the density of the object, pair is the density…

A: The terminal velocity of an object in a fluid is the maximum speed at which it can fall through that…

Q: A 15kg STEEL BALL IS SUSPENDED AT THE AIR USING 2 DIFFERENT TYPES OF CABLES. CABLE A IS MADE UP OF…

A:

Q: dv, y) Momentum is transfered from areas of high velocity those of lower velocity The difference in…

A:

Q: Hoops spend much of there lives in water but amazingly they don’t swim they have like manatees very…

A:

Q: A Boeing 747-8I aircraft has a mass of 447,700 kg. This includes cargo. The combined area of both…

A: Since the pressure difference lifts the plane. Thus, the pressure difference must have to create a…

Q: In downhill speed skiing a skier is retarded by both the air drag force on the body and the kinetic…

A: θ = 42.0°μk= 0.0410A = 1.70m2C = 0.150 ρ = 1.20 kg/m3

Q: In downhill speed skiing a skier is retarded by both the air drag force on the body and the kinetic…

A: The answer is given below

Q: A barge floats in the Atlantic Ocean (salt water with a density of 1025 kg/m3). If the barge is a…

A:

Q: Water is discharged from the hose with a speed of 42ft/sec. Determine the two possible angles the…

A:

Q: Air flows over the upper surfaces of the wings of an acroplane at a speed of 120.0ms, and past the…

A: Given : Speed of air on lower surface of wings of  aeroplane, v1 = 110.0 m/s Speed of air on upper…

Q: A 1.2-m-external-diameter spherical tank is located outdoors at 1 atm and 25°C and is subjected to…

A:

Q: A mountain-climber of mass 82 kg ponders the idea of attaching a helium-filled balloon to himself to…

A:

Q: A storage shed has a flat roof 4 meters long and 3 meters wide. A hurricane force wind blows across…

A: Shed dimensions: length= 4 m breadth= 3m wind blow rate= 35 m/s density of air = 1.2 kg/ m2

Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!