Calculate the ratio of the drag force on a jet flying at 1170 km/h at an altitude of 9.5 km to the drag force on a prop-driven transport flying at half that speed and altitude. The density of air is 0.41 kg/m3 at 9.5 km and 0.68 kg/m3 at 4.8 km. Assume that the airplanes have the same effective cross-sectional area and drag coefficient C.
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Calculate the ratio of the drag force on a jet flying at 1170 km/h at an altitude of 9.5 km to the drag force on a prop-driven transport flying at half that speed and altitude. The density of air is 0.41 kg/m3 at 9.5 km and 0.68 kg/m3 at 4.8 km. Assume that the airplanes have the same effective cross-sectional area and drag coefficient C.
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- A pulley is attached to one end of a rough plank, which makes an angle of 34◦ with the horizontal. A box is held at rest on the plank by a string that is attached to the box and passes over the pulley. A bucket of water is attached to the other end of the string and hangs freely. The coefficient of static friction between the plank and the box is 0.8. The box remains at rest but is on the point of slipping up the plank. The bucket of water has mass 7.5 kg.Name the four forces acting upon the box and draw a force diagram showing them, including the angles that show their directions.A rope of mass 2.0 kg is fastened at one end to the ceiling of an elevator, and the other end hangs free. The elevator is moving downwards and is slowing down at a rate of 2.00 m/s^2. Find the tension in the rope at (a) the point attached to the ceiling, (b) the middle point, and (c) the lower end. Assume the density of the rope is uniform. Justify your answers by drawing free-body diagrams and applying Newton's laws. (d) Please also indicate the direction of the acceleration of the rope.A constant force Fa pushes a 22.5-kg box across a rough horizontal surface. The magnitude of Fa is 185 N and the force is inclined at an angle of θ = 30.0° below the horizontal. The coefficient of kinetic friction between the box and the surface is μk = 0.500. What is the magnitude of the box's acceleration?
- A fish is swimming through water at a terminal velocity (constant maximum velocity) of 0.5 m/s propelled by a pushing force it generates by wiggling its tail. A fluid drag force of magnitude Farag = bv acts in a direction opposite the motion and the drag coefficient b=0.3 N/(m/s). What must the magnitude of the pushing force be? Select the correct answer O Greater than 0.5 N O Between 0.2 and 0.3 N O Between 0 and 0.1 N O Between 0.1 and 0.2 N O Between 0.3 and 0.5 NAn initially stationary box of sand is to be pulled across a floor by means of a cable in which the tension should not exceed 876 N. The coefficient of static friction between the box and the floor is 0.410. (a) What should be the angle between the cable and the horizontal in order to pull the greatest possible amount of sand, and (b) what is the weight of the sand and box in that situation? (a) Number i Units (b) Number UnitsCalculate the ratio of the drag force on a jet flying at 900 km/h at an altitude of 10 km to the drag force on a prop-driven transport flying at one-fifth the speed and half the altitude of the jet. The density of air is 0.38 kg/m3 at 10 km and 0.67 kg/m3 at 5.0 km. Assume that the airplanes have the same effective cross-sectional area and drag coefficient C. (drag on jet/drag on transport) =
- An initially stationary box of sand is to be pulled across a floor by means of a cable in which the tension should not exceed 876 N. The coefficient of static friction between the box and the floor is 0.360. (a) What should be the angle between the cable and the horizontal in order to pull the greatest possible amount of sand, and (b) what is the weight of the sand and box in that situation? (a) Number Enter your answer for part (a) in accordance to the question statement Units Choose the answer for part (a) from the menu in accordance to the question statement This answer has no units° (degrees)mkgsm/sm/s^2NJWN/mkg·m/s or N·sN/m^2 or Pakg/m^3gm/s^3times (b) Number Enter your answer for part (b) in accordance to the question statement Units Choose the answer for part (b) from the menu in accordance to the question statement This answer has no units°…Calculate the ratio of the drag force on a jet flying at 999 km/h at an altitude of 8.10 km to the drag force on a prop-driven transport flying at half that speed and altitude. The density of air is 0.490 kg/m3 at 8.10 km and 0.725 kg/m3 at 4.05 km. Assume that the airplanes have the same effective cross-sectional area and drag coefficient C.A sled of mass 500kg sits at rest on a rough slope that is inclined at 10* to the horizontal. The coefficient of friction between the slope and the sled is 0.3. The sled is held in place by a wire attached to a winch. The tension in the wire is TN. a) Find the maximum possible value of T. A load of mass mkg is added to the sled, and tension in the wire is increased to 5000N in order to pull the sled and load up the slop. Given that the sled and load are pulled a distance of 100m in 80seconds, b) Work out the value of m