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A 60 kg man stands on a spring scale in a lift. At some instant, he finds that the scale reading has changed from 60 kg to 50 kg for a while and then comes back to original mark. What should be concluded?
- a)The lift was in constant motion upwards
- b)The lift was in constant motion downwards
- c)The lift while in downward motion suddenly stopped
- d)The lift while in upward motion suddenly stopped
Correct answer is option 'D'. Can you explain this answer?
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A 60 kg man stands on a spring scale in a lift. At some instant, he f...
The reading of the spring scale is the normal reaction between the man and the spring scale.
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As the reading decreases, it means that the normal reaction is also decreasing. Firstly, the lift must be moving upwards with a constant velocity and then decelerated to rest.
Most Upvoted Answer
A 60 kg man stands on a spring scale in a lift. At some instant, he f...
The Correct Answer is Option D: The lift while in upward motion suddenly stopped
Explanation:
When a man stands on a spring scale in a lift, the scale measures the force exerted by the man on it, which is equal to the weight of the man. The weight of an object is the force with which it is pulled towards the center of the Earth.
In this scenario, the man's weight is initially measured as 60 kg by the spring scale. However, after some time, the scale reading decreases to 50 kg and then comes back to the original mark. Based on this observation, we can draw the following conclusions:
1. Relationship between weight and scale reading:
- The scale reading on the spring scale is directly proportional to the weight of the man. When the scale reading decreases, it indicates that the force exerted by the man on the scale has decreased.
2. Change in scale reading:
- When the scale reading decreases from 60 kg to 50 kg, it means that the force exerted by the man on the scale has decreased by 10 kg.
- This decrease in force can be explained by a sudden decrease in the man's weight or a sudden decrease in the acceleration due to gravity acting on the man.
3. Effect of lift motion:
- When a lift is in constant motion upward or downward, the weight of the man remains constant.
- Therefore, if the lift were in constant motion upwards or downwards, the scale reading would not have changed from 60 kg to 50 kg.
4. Conclusion:
- Since the scale reading changes from 60 kg to 50 kg and then returns to the original mark, it indicates a sudden change in the force exerted by the man on the scale.
- The most likely explanation for this change is that the lift, while in upward motion, suddenly stopped.
- When the lift suddenly stops, the man's body tends to continue moving upwards due to inertia, causing a decrease in the force exerted by the man on the scale.
Therefore, based on the given information, we can conclude that the lift, while in upward motion, suddenly stopped.
Explanation:
When a man stands on a spring scale in a lift, the scale measures the force exerted by the man on it, which is equal to the weight of the man. The weight of an object is the force with which it is pulled towards the center of the Earth.
In this scenario, the man's weight is initially measured as 60 kg by the spring scale. However, after some time, the scale reading decreases to 50 kg and then comes back to the original mark. Based on this observation, we can draw the following conclusions:
1. Relationship between weight and scale reading:
- The scale reading on the spring scale is directly proportional to the weight of the man. When the scale reading decreases, it indicates that the force exerted by the man on the scale has decreased.
2. Change in scale reading:
- When the scale reading decreases from 60 kg to 50 kg, it means that the force exerted by the man on the scale has decreased by 10 kg.
- This decrease in force can be explained by a sudden decrease in the man's weight or a sudden decrease in the acceleration due to gravity acting on the man.
3. Effect of lift motion:
- When a lift is in constant motion upward or downward, the weight of the man remains constant.
- Therefore, if the lift were in constant motion upwards or downwards, the scale reading would not have changed from 60 kg to 50 kg.
4. Conclusion:
- Since the scale reading changes from 60 kg to 50 kg and then returns to the original mark, it indicates a sudden change in the force exerted by the man on the scale.
- The most likely explanation for this change is that the lift, while in upward motion, suddenly stopped.
- When the lift suddenly stops, the man's body tends to continue moving upwards due to inertia, causing a decrease in the force exerted by the man on the scale.
Therefore, based on the given information, we can conclude that the lift, while in upward motion, suddenly stopped.
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A 60 kg man stands on a spring scale in a lift. At some instant, he finds that the scale reading has changed from 60 kg to 50 kg for a while and then comes back to original mark. What should be concluded?a)The lift was in constant motion upwardsb)The lift was in constant motion downwardsc)The lift while in downward motion suddenly stoppedd)The lift while in upward motion suddenly stoppedCorrect answer is option 'D'. Can you explain this answer?
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A 60 kg man stands on a spring scale in a lift. At some instant, he finds that the scale reading has changed from 60 kg to 50 kg for a while and then comes back to original mark. What should be concluded?a)The lift was in constant motion upwardsb)The lift was in constant motion downwardsc)The lift while in downward motion suddenly stoppedd)The lift while in upward motion suddenly stoppedCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A 60 kg man stands on a spring scale in a lift. At some instant, he finds that the scale reading has changed from 60 kg to 50 kg for a while and then comes back to original mark. What should be concluded?a)The lift was in constant motion upwardsb)The lift was in constant motion downwardsc)The lift while in downward motion suddenly stoppedd)The lift while in upward motion suddenly stoppedCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 60 kg man stands on a spring scale in a lift. At some instant, he finds that the scale reading has changed from 60 kg to 50 kg for a while and then comes back to original mark. What should be concluded?a)The lift was in constant motion upwardsb)The lift was in constant motion downwardsc)The lift while in downward motion suddenly stoppedd)The lift while in upward motion suddenly stoppedCorrect answer is option 'D'. Can you explain this answer?.
A 60 kg man stands on a spring scale in a lift. At some instant, he finds that the scale reading has changed from 60 kg to 50 kg for a while and then comes back to original mark. What should be concluded?a)The lift was in constant motion upwardsb)The lift was in constant motion downwardsc)The lift while in downward motion suddenly stoppedd)The lift while in upward motion suddenly stoppedCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A 60 kg man stands on a spring scale in a lift. At some instant, he finds that the scale reading has changed from 60 kg to 50 kg for a while and then comes back to original mark. What should be concluded?a)The lift was in constant motion upwardsb)The lift was in constant motion downwardsc)The lift while in downward motion suddenly stoppedd)The lift while in upward motion suddenly stoppedCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 60 kg man stands on a spring scale in a lift. At some instant, he finds that the scale reading has changed from 60 kg to 50 kg for a while and then comes back to original mark. What should be concluded?a)The lift was in constant motion upwardsb)The lift was in constant motion downwardsc)The lift while in downward motion suddenly stoppedd)The lift while in upward motion suddenly stoppedCorrect answer is option 'D'. Can you explain this answer?.
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