Use the following information for the remaining multiple-choice questions: When

Question

Use the following information for the remaining multiple-choice questions: When an object with mass m is dropped near the surface of Earth, it will fall to the ground due to the force of gravity. Near the surface the force of gravity, F, can be determined from the following equation: F = m g where g is the acceleration due to gravity (g = 9.8 m/s2 ). In the presence of air, a falling object will also experience an air resistance, Fa, which opposes the motion of the object. The net force on an object with mass m falling through the air near the surface of Earth is thus given by: Fnet = m g - Fa The air resistance, Fa, depends on such factors as the speed, size, shape, and surface texture of the object.

19. Consider again the object dropped from a high-flying balloon and reaching terminal velocity after 8 seconds. During which time interval does it increase its velocity by the greatest amount? A) 0-1s B) 2-3 s C) 4-5 s D) 6-7 s  

Explanation / Answer

the velocity goes increasing from 0 to 8 seconds

so the increase in velocity between 6-7 s is higher than other options

and during this time only the distance travelled is greater

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