HomeAsset LibraryAstronomyPhysics 2010School FilesSoftwareSpeed TestTrek DataTriviaVideo GamesWallpaperWeather
The following physics responses are provided by a student and, as such, should be considered in that context. While every effort is made for accuracy, absolute correctness cannot be fully guaranteed.
| C | I | Question | Answer |
|---|---|---|---|
| 7 | A ceiling fan is turned on and reaches an angular speed of 120 rev/min in 20 s. It is then turned off and coasts to a stop in 40 s. In the one minute of rotation, through how many revolutions did the fan turn? | 60 | |
| 7 | A ceiling fan is turned on and reaches an angular speed of 120 rev/min in 20 s. It is then turned off and coasts to a stop in an additional 40 s. The ratio of the average angular acceleration for the first 20 s to that for the last 40 s is which of the following? | -2 | |
| 7 | A cylindrical space colony 8 km in diameter and 30 km long has been proposed as living quarters for future space explorers. Such a habitat would have cities, land and lakes on the inside surface and air and clouds in the center. All this would be held in place by the rotation of the cylinder about the long axis. How fast would such a cylinder have to rotate to produce a 1-g gravitational field at the walls of the cylinder? | 0.05 rad/s | |
| 7 | A fan blade, initially at rest, rotates with a constant acceleration of 0.025 rad/s2. What is its angular speed at the instant it goes through an angular displacement of 4.2 rad? | 0.46 rad/s | |
| 7 | A fan blade, initially at rest, rotates with a constant acceleration of 0.025 rad/s^2. What is the time interval required for it to reach a 4.2-rad displacement after starting from rest? | 18 s | |
| 7 | A Ferris wheel starts at rest and builds up to a final angular speed of 0.70 rad/s while rotating through an angular displacement of 4.9 rad. What is its average angular acceleration? | 0.05 rad/s^2 | |
| 7 | A Ferris wheel, rotating initially at an angular speed of 0.50 rad/s, accelerates over a 7.0-s interval at a rate of 0.040 rad/s^2. What is its angular speed after this 7-s interval? | 0.78 rad/s | |
| 7 | A Ferris wheel, rotating initially at an angular speed of 0.500 rad/s, accelerates over a 7.00-s interval at a rate of 0.040 0 rad/s2. What angular displacement does the Ferris wheel undergo in this 7-s interval? | 4.48 rad | |
| 7 | A grindstone spinning at the rate of 8.3 rev/s has what approximate angular speed? | 52 rad/s | |
| 7 | A point on the rim of a 0.15-m-radius rotating disk has a centripetal acceleration of 5.0 m/s2. What is the angular speed of a point 0.075 m from the center of the disk? | 5.8 rad/s | |
| 7 | A point on the rim of a 0.25-m-radius fan blade has centripetal acceleration of 0.20 m/s2. Find the centripetal acceleration of a point 0.05 m from the center of the same wheel. | 0.04 m/s^2 | |
| 7 | A point on the rim of a 0.25-m-radius rotating wheel has a centripetal acceleration of 4.0 m/s^2. What is the angular speed of the wheel? | 4.0 rad/s | |
| 7 | A point on the rim of a 0.30m radius rotating wheel has a tangential speed of 4.0m/s. What is the tangential speed of a point 0.20m from the center of the same wheel? | 2.7 m/s | |
| 7 | A roller coaster, loaded with passengers, has a mass of 2 000 kg; the radius of curvature of the track at the bottom point of the dip is 24 m. If the vehicle has a speed of 18 m/s at this point, what force is exerted on the vehicle by the track? (g = 9.8 m/s2) | 4.7*10^4N | |
| 7 | A satellite is in a circular orbit about the Earth at a distance of one Earth radius above the surface. What is the speed of the satellite? (The radius of the Earth is 6.4*10^6 m, and G = 6.67*10^-11 N*m^2/kg^2.) | 5 600 m/s |
© 2026 - KillGorack.com
Privacy Policy
License information
Social media
Site map
Contact
KillGorack / Home