N9M.1 Estimate the speed at which the drag on a 150-g steel ball becomes equal to about 1% of its weight. (The density of steel is about 7900 kg/m³, and C for a sphere is about equal to 0.5.)
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- If a bubble in sparkling water accelerates upward at the rate of 0.225 m/s2 and has a radius of 0.500 mm, what is its mass? Assume that the drag force on the bubble is negligible.Q6 In Fig. X6.6.6 assume that friction is negligible, that 0- 115°, and that the water jet has a velocity of 95 fps and a diameter of 1 in. Find (a) the component of the force acting on the blade in the direction of the jet; (b) the force component normal to the jet; and (c) the magnitude and direction of the resultiant force exerted on the blade. Plan view Figure X6.6.6Consider two geometrically identical marbles stacked in a container as shown. The radius of each of the marbles is R. while the width of the container is 2.9R The marble at the top has a weight 0.78 N while the weight of the lower marble has a weight of 0.84 N. What is the magnitude of the normal force at point B? Express your answer in Newtons and with two decimal places. C A В
- of earth 5.5 x 10' kg / m3 (G = 6.67 × 10-" S. L form the surface of the earth. Average density Ex. 62: Calculate the escape velocity of a body %3D %3D units; R = 6.4 x 106 m). ofx 00/Running on a treadmill is slightly easier than running outside because there is no drag force to work against. Suppose a 60 kg runner completes a 5.0 km race in 15 minutes. Determine the drag force on the runner during the race. Suppose that the cross-section area of the runner is 0.72 m2. What is this force as a fraction of the runner's weight?Which of the following is the unit for the coefficient of viscosity: Select one: O a. cm/g.s O b. g.s/cm O c. g.cm/s O d. g/cm.s Clear my choice Next poge ge NEXT ACTIVITY
- Wing Loading of = 570 N/m² Co = 0.06 +0.0150₂² The glider was launched at 500 meters altitude. Calculate for mimimum rate of descent in meters per second. (Round off answer with two decimal places, No units, No commas) Answer given: 23554 Which is not true about the effect of altitude? A. Points with the same value of a therefore must have the same glide path angle. B. The drag polar changes with flight speed. C. The glide path angle is independent of altitude and depends solely on the angle of attack.A 0.50-mm-radius fishing line made of nylon is 100 m long when no forces are applied. A fish is hooked and pulls with a tension force Of 250 N. What is the elongation?The lamina shown is a quarter circle with radius 4 cm and mass M kg. Find the angle that AB makes with the vertical when a mass of 0.5M kg is attached to C and the lamina is freely suspended from B. В 4 cm A
- Lift on an airplane is F = (P2-P1) A. The total wing area of a certain airplane is 20 square meter. Air, of density 1.2 kg/m3 , is streaming past the upper wing at 50 m/s and the lower wing at 10 m/s. What is the lift on this airplane? %3D of O a 800 N O b. 9,600N Oc 480 N Od. 16,000 N8. A 24.0-cm-diameter cylinder with length of 60.0 cm which it is falling vertically on its circular side has a terminal speed of 90 m/s in the air. What is the cylinder's mass? Density of air is 1.3 kg/m³ and drag coefficient of C=0.75.A bull shark has a reduced weight (or “submerged weight” = W - B) of 4Nin seawater and 12N in freshwater, i.e., as found in rivers (bull sharks have been known to swim into rivers from the ocean – including the Mississippi river!). How much more lift force needs to be generated when transitioning from sea to freshwater? Assuming that CL stays the same, calculate how much faster the shark has to go in order to swim horizontally in freshwater (i.e., relative to the swim speed in saltwater)?