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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 spool of thread has an average radius of 1.00 cm. If the spool contains 62.8 m of thread, how many turns of thread are on the spool? | 1000 | |
| 7 | A ventilation fan has blades 0.25 m in radius rotating at 20 rpm. What is the tangential speed of each blade tip? | 0.52 m/s | |
| 7 | A ventilation fan has blades 0.25 m long rotating at 20 rpm. What is the centripetal acceleration of a point on the outer tip of a blade? | 1.1 m/s^2 | |
| 7 | A wheel is rotated about a horizontal axle at a constant angular speed. Next it is rotated in the opposite direction with the same angular speed. The acceleration at a point on the top of the wheel in the second case as compared to the acceleration in the first case: | is in the same direction. | |
| 7 | According to Kepler's second law, Halley's Comet circles the Sun in an elliptical path with the Sun at one focus of the ellipse. What is at the other focus of the ellipse? | nothing | |
| 7 | An airplane in a wide sweeping "outside" loop can create zero gees inside the aircraft cabin. What must be the radius of curvature of the flight path for an aircraft moving at 150 m/s to create a condition of "weightlessness" inside the aircraft? | 2 300 m | |
| 7 | An artificial Earth satellite in an elliptical orbit has its greatest centripetal acceleration when it is at what location? | nearest the Earth | |
| 7 | An asteroid has a perihelion (the orbit's closest approach to the sun) of 1.5 AU and a period of revolution of 8.0 y. What is its greatest distance from the sun (its aphelion)? | 6.5 AU | |
| 7 | An asteroid in orbit about the sun has a linear speed of 4 km/s when at a distance of closest approach d from the sun. What is its linear speed when it is at its greatest distance from the sun, a distance 2 d? | 2 km/s | |
| 7 | An asteroid is in orbit at 4 times the earth's distance from the Sun. What is its period of revolution? | 8 years | |
| 7 | An Earth satellite is orbiting at a distance from the Earth's surface equal to one Earth radius (4 000 miles). At this location, the acceleration due to gravity is what factor times the value of g at the Earth's surface? | 1/4 | |
| 7 | An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N. The radius of the planet is 4.0*10^6 m. What free fall acceleration will the 0.50-kg object experience when at the surface of Planet X? | 40 m/s^2 | |
| 7 | An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N. The radius of the planet is 4.0*10^6m. What free fall acceleration will the 0.50-kg object experience when transported to a distance of 2.0*10^6m from the surface of this planet? | 18 m/s^2 | |
| 7 | An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N. The radius of the planet is 4.0*10^6m. What is the mass of Planet X? (G = 6.67*10^-11 N*m^2/kg^2) | 9.6*10^24kg | |
| 7 | An object when orbiting the Earth at a height of three Earth radii from the center of the Earth has a weight of 1.00 N. What is the object's mass? (g at the surface of the Earth is 9.8 m/s^2) | 0.92 kg |
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