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CBSE Class 9 Answered

Which is easier to lift? 1.1 g iron 2. 1 g of losely packed feather 3.1g water 4. no difference   with reason. answer 
Asked by Shrivatsa | 23 Feb, 2018, 07:46: PM
answered-by-expert Expert Answer
All are same.
When we lift an object, we are increasing the gravitational potential energy of the object. Gravitational potential energy is 'mgh', depends on mass. Since mass of iron, loosely packed feather and water are same, we need to spent same energy to lift them individually.
Answered by Thiyagarajan K | 24 Feb, 2018, 09:33: AM
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