Question

एक पिण्ड को पृथ्वी की सतह से h ऊँचाई तक ऊपर उठाया जा रहा है तो गुरुत्वाकर्षण
बल द्वारा किये गये कार्य का चिन्ह क्या है?​

Answer 1

एक  पिण्ड को पृथ्वी की सतह से h ऊँचाई तक ऊपर उठाया जा रहा है तो गुरुत्वाकर्षण  बल द्वारा किये गये कार्य का चिन्ह -ve है

Step-by-step explanation:

Applied force to do work is taken as +ve

Applied force is in upward direction

But gravitational force is in downward direction

Hence  work done by gravitational force wil be taken as - ve

A body is being raised to a height h from the surface of earth then sign of work done by gravitational force is -ve

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