Estimate the terminal speed of a wooden sphere (density 0.830 g/cm3) falling through air, if its radius is 8.00 cm and its drag coefficient is 0.500. (The density of air is 1.20 kg/m3.) (b) From what height would a freely falling object reach this speed in the absence of air resistance?

The terminal velocity of a person falling in air depends upon the weight and the area of the person facing the fluid. Find the terminal velocity (in meters per second and kilometers per hour) of an 82.0 kg skydiver falling in a pike (headfirst) position with a surface area of 0.135 m². (Assume that the density of air is 1.21 kg/m³ and the drag coefficient of a skydiver in a pike positioni 0.7. For each answer, enter a number.) terminal velocity in m/s x m/s terminal velocity in km/h X km/h

A 66.0 kg and a 93.0 kg skydiver jump from an airplane at an altitude of 5.95 ✕ 103 m, both falling in the pike position. Assume all values are accurate to three significant digits. (Assume that the density of air is 1.21 kg/m3 and the drag coefficient of a skydiver in a pike position is 0.7.)   How long will it take (in s) for each skydiver to reach the ground (assuming the time to reach terminal velocity is small)? 66.0 kg skydiver  93.0 kg skydiver

Quadratic Drag in One Dimension Consider an object that is dropping quadratic drag force vertically (positive y direction is vertically down) subject to a fdrag = -f(v)v with f(v) cu2. (a) Write down the differential equation from Newton's second law for this object. (b) Show that the terminal speed is vter = (c) Solve for vy in the case of vyo Uter Vmg/c. Hint: You may find the integrals in Appendix E in Thornton & Marion useful (p613). |

To maintain a constant speed, the force provided by a car's engine must equal the drag force plus the force of friction of the road (the rolling resistance). The density of air is 1.2 kg/m³. (a) What are the drag forces in newtons at 75 km/h and 109 km/h for a Toyota Camry? (Drag area = 0.70 m² and drag coefficient = 0.28.) at 75 km/h at 109 km/h N N (b) What are the drag forces in newtons at 75 km/h and at 109 km/h for a Hummer H2? (Drag area = 2.44 m² and drag coefficient = 0.57.) at 75 km/h at 109 km/h N N

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.

The terminal velocity of a person falling in air depends upon the weight and the area of the person facing the fluid. Find the terminal velocity (in meters per second and kilometers per hour) of an 88.0 kg skydiver falling in a pike (headfirst) position with a surface area of 0.150 m2. (Assume that the density of air is 1.21 kg/m³ and the drag coefficient of a skydiver in a pike position is 0.7. For each answer, enter a number.) terminal velocity in m/s |m/s terminal velocity in km/h km/h

During the 400 m race in question 5, Callie is now in the homestretch. Assume that the density of the air is 1.2 kg/m, that Callie’s cross-sectional area is 0.5 m2, and that her coefficient of drag is 1.1. Her velocity is still 8 m/s, but she now has a 2 m/s tailwind. How large is the drag force acting on Callie now?

A suspended mass of 20 grams located at  210°  in the force table is the same as: