19. A bucket is being lowered by a very light rope with a constant downward velocity. The magnitude of the tension on the rope is...
- A. equal to the weight of the bucket.
- B. greater than the weight of the bucket.
- C. less than the weight of the bucket.
- D. exactly half the weight of the bucket.
20. An object is moving with constant, non-zero velocity. Which of the following statements about the object must be true?
- A. A constant force is being applied to it in the direction of motion.
- B. A constant force is being applied to it in the direction opposite of motion.
- C. A constant force is being applied to it perpendicular to the direction of motion.
- D. The net force on the object is zero.
1 Answers
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19. Bucket lowered with constant small velocity i.e., it has no acceleration other than acceleration due to gravity. Hence tension in the rope is equal to weight of bucket only. Option A.
20. Object is moving with constant non zero velocity. Hence acceleration of object is zero. i.e., Net force on object is zero. Option D.