science
Grade8
Easy
Question
Joe wants to check the constancy of the acceleration due to gravity in his garden, for which he collects some objects such as a piece of cloth, an iron ball, an apple and drops them all at a time from the same height (I). He finds that the objects do not land at the same time. However, he then performs the same experiment in an evacuated glass tube (II), where all the objects land at the same time. Which of the above two experiments is the right way of checking the constancy of the acceleration due to gravity. Why?
- As it is done outdoors, which is a natural environment
- As it is done in a laboratory setup where the glass tube is evacuated to eliminate the air resistance
- Neither (I) nor (II)
- Both (I) and (II)
Hint:
As it is done in a laboratory setup where the glass tube is evacuated to eliminate the air resistance.
The correct answer is: As it is done in a laboratory setup where the glass tube is evacuated to eliminate the air resistance
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