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The hydrogen-filled airship Hindenburg (see Fig. 11-24) could cruise at 77 knots with the engines providing 4800 hp. Calculate the air drag force in newtons on the airship at this speed.

```
5 years ago

Deepak Patra
471 Points
```							To obtain air drag force in newtons, substitute 77 knots for v and 4800 hp for P in the equation F = P/v,F = P/v = 4800 hp/77 knots = (4800 hp/77 knots) (745.7 W/1 hp) (1 knot/1.688 ft/s) (1 ft/s/0.3048 m/s) = 9.0×104 W/m/s = (9.0×104 W/m/s) (1 N/1 W/m/s) =9.0×104 N …… (3)From the above observation we conclude that, air drag force in newtons on the airship at this speed will be 9.0×104 N.
```
5 years ago
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### Course Features

• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions