Suppose the horizontal velocity of the wind against a sail is 6.3 m/s parallel to its front surface and 3.5 m/s along its back surface. -Calculate the magnitude of the force on a square meter of sail in N, given that the density of air is 1.29 kg/m3.

Q: An Airbus A380-800 passenger airplane is cruising at constant altitude with a constant velocity. The…

A: Total surface area of the two wings, A = 395 m2Average speed of the air just below the wings, v1 =…

Q: An air-plane has an effective wing surface area of 16.5 m² that is generating the lift force. In…

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Q: An aircraft has a total wing area of 360 m². The air speed over its wings at take-off is 94 m/s and…

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Q: On 23 March 2021 the giant container ship "Ever Given", under strong winds, swivelled round to…

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Q: An anchor of mass 105 kg and volume 4 x 102 m is resting on the bottom of a lake, with rope of…

A: Given  Mass of anchor m = 105 kg Volume of anchor V = 4 × 10-2 m3 To find  Force must be exerted on…

Q: Is it possible for water to have an angle of contact as high as 160 degree ? If so, when?

A: The contact angle is the angle between the tangent to any liquid-fluid interface and the tangent to…

Q: Three liquids that will not mix are poured into a cylindrical container. The volumes and densities…

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Q: : A thin circular wire ring of platinum has circumference of 8 cm. It floats horizontally on water.…

A: We need to compute-Surface tension of water (T)=?The data given as-Circumference of wire (2πr)=8…

Q: A flat roof is very susceptible to wind damage during a thunderstorm and/or tornado. If a flat roof…

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Q: Suppose you walk 14.5 m in a direction exactly 19° south of west then you walk 22 m in a direction…

A: The walking distance along 19 degrees south of west is The walking distance along 39 degrees west of…

Q: The force needed to maintain a constant velocity of 0.8 m/s on air track is found to be 0.005 N. The…

A: Given data: The velocity is v=0.8 m/s. The force is F=0.005 N. The area of the cart is A=0.05 m2.…

Q: The leaves of a tree lose water to the atmosphere via the process of transpiration. A particular…

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Q: A large tank is kept full at a height of h = 4 m as shown in Fig. 3. Take the 103 kg/m³. (a) Find…

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Q: •The horizontal Velocity of wind against sail = 5.7 m/s. along the front surface, 3.2 m/s back…

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Q: A person is attempting to build a raft by lashing together some wooden logs. However, they are…

A: (1)mass of the log,m=100000 glength of the log, L=140cmradius of the log, r=15cmLog isin…

Q: An object of mass 125 kg is released from rest from a boat into the water and allowed to sink. While…

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Q: Suppose that you release a small ball from rest at a depth of 0.590 m below the surface in a pool of…

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Q: You build a boat with mass of 3350 kg and a volume of 11 m^3. If it is placed in the water, how much…

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Q: Three liquids that will not mix are poured into a cylindrical container. The volumes and densities…

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Q: liquids that will not mix are poured into a cylindrical container. The volumes and densities of the…

A: Force due to liquid column  F = mg     Density = mass / volume  So  Mass = volume × density

Q: (1%) Problem 16: A submarine is stranded on the bottom of the ocean with its hatch 25 m below the…

A: Pressure on outside of the hatch of the submarine at 25 m below the surface of sea will be,…

Q: An air-plane has an effective wing surface area of 16.5 m² that is generating the lift force. In…

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Q: 124 km/h winds slam head-on into a building 49 meters wide and 71 meters high, bringing the material…

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Q: For an airplane in flight, the average speed of the air relative to the plane is 295 m/s below the…

A: Given: vL=295 m/svu=324 m/sA=31.5 m2 To Find: net upward force of air on the plane

Q: For an airplane in flight, the average speed of the air relative to the plane is 309 m/s below the…

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Q: 11A). The air speed over the top of a wing needs to be faster than the air speed under the wing.…

A: 11A. Given Pressure difference P2 -P1 = 1000 N/m2 Airspeed under the wing v2  = 60 m/s The density…

Q: ercury barometer at the base of the mountain reads 771 mm. At the same time, another barometer at…

A: reading at  base = Pbase = 771 mm =  771 x133.32 pascal  =102789.72 pascal reading at top = Pt = 436…

Q: The diameter of the trachea (windpipe) is about 18 mm.  What net force does the air experience…

A: So, the net force experienced by the air during inhalation is approximately…

Q: A fun toy for all ages is the bottle rocket. The one in the picture was made by adding fins to a…

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Q: For an airplane in flight, the average speed of the air relative to the plane is 312 m/s below the…

A: Given : The average speed of the air above the wings (V1)=  343 m/s The average speed of the air…

Q: A balloon filled with helium gas has an average density of ρb = 0.31 kg/m3. The density of the air…

A: The objective of the question is to express the total force F on a helium balloon floating upward in…

Q: The construction of a flat rectangular roof (5.54 m x 6.63m) allows it to withstand a maximum net…

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Q: The terminal velocity of a person falling in air depends upon the weight and the area of the person…

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Q: An anchor of mass 105 kg and volume 4 x 102 m³ is resting on the bottom of a lake, with rope of…

A: Given  Mass of anchor m = 105 kg  Volume of anchor V = 4 × 10-2 m3 To find  Force that should be…

Q: For an airplane in flight, the average speed of the air relative to the plane is 309 m/s below the…

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Q: How high would you have to go in the atmosphere for half of the mass of air to be below you?

A: Atmospheric pressure decreases with increasing height. The half of the atmospheric molecules are…

Q: If the balloon is perfectly spherical, calculate it's diameter provided the following values: M =…

A: the bouancy on balloon will be equal to the weight of climber and balloon

Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”