Speed Essay Example

Speed Essay Example Speed Essay Speed Essay Trevor Hale 10th Physical Science 01 / 16 / 09 1. A: Reference Point a point against which position is measured. B: Vector Quantity a physical measurement that contains directional information. C: Scalar Quantity a physical measurement that does not contain directional information. D: Acceleration the time rate of change of an objects velocity. E: Free Fall the motion of an object when it is falling solely under the influence of gravity. 2. No. Motion depends on the reference point that is used. 3. That depends on the reference point that is used. The glass is not moving relative to the counter. 4. A: The girl joggers. B: Child in inner tube. C: The first girl jogging. 5. 30 Min. x 1 Hr. = 0. 5 60 min. 10 Miles = 20 Miles/Hr. 0. 5 Hours 6. 6 Kilometers x 1000 Meters = 6000 Meters 1 Kilometer 45 Min. x 60 Seconds = 2700 Seconds 1 Min 6000 Meters = 2. 2 Meters 2700 Seconds Second 7. A: 10 meters scalar quantity, distance. B: 1. 2 meters/second? east. C: 3. 4 feet/hour and slowing scalar, speed. D: 56 liters, scalar, none of these. E: 2. 2 miles/min east, vector, velocity. F: 2. 2 milometer’s/year, scalar, speed. 8. Relative speed = 57 Miles 45 Miles = 12 Miles Hour Hour Hour 12 Miles/Hour toward each other. 9. Since velocity is constant, there is no acceleration. 10. 12 Meters Per Second = 6 Meters per second? west. 2 Seconds 1. 30 Miles Hour 12 Min. x 1 Hour = 0. 2 Hours. 60 Min. 30 Miles ? 0. 2 Hours. Hour 150 Miles/Hour? south. 12. Any object that is affected greatly by air resistance cannot experience free fall when dropped near the surface of the earth. In order to experience free fall, an object must be falling solely under the influence of gravity. Air resistance is an influence other than gravity. 13. All objects falling near the earth’s surface accelerate equally. 14. Both hit at the same time since there is no air resistance.