উলম্ব অক্ষ বরাবর দুটি বস্তু একটি অন্যটি অপেক্ষা 30 cm উপরে আছে। যদি বস্তুদ্বয় একই সাথে মুক্তি পায় এবং মধ্যাকর্ষণের প্রভাবে অবাধে নিচে পরে, তবে 2s পর তাদের মধ্যবর্তী দূরত্ব কত হবে? (Two bodies, one held 30 cm directly above the other, are released simultaneously and fall freely under gravity. What will be their separation after 2 s?)

The answer is correct because both bodies are falling freely under the influence of gravity. When they are released from rest, they will both start to accelerate downward at the same rate due to gravity (approximately 9.8 m/s²).

After 2 seconds of free fall:

    
• The distance fallen by each object can be calculated using the formula:
    
        
• d = (1/2)gt², where g is the acceleration due to gravity and t is the time in seconds.
    
    
• Plugging in the values:
    
        
• d = (1/2) * 9.8 m/s² * (2 s)² = 19.6 m, or approximately 20 m.
    

Since both objects start from the same height of 30 cm and fall the same distance, their separation does not change. Therefore, even after 2 seconds of falling, the distance between them remains 30 cm.

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