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A ball is thrown vertically upwards from the ground.Work done by air resistance during its time of flight is …...............\tPositive during ascent and negative during descent.\tPositive during ascent and descent.\tNegative during ascent and positive during descent.\tNegative during ascent andd descent.Choose the correct one and explain.

Janga vidya charan , 6 Years ago

Grade 11

1 Answers

Eshan

Last Activity: 6 Years ago

Dear student,

During ascent, the direction of displacement is positve, but the air resistance acts downwards. Hence work done is negative.

Similarly, during descent, displacement is negative but the air resistance works upwards, hence work done is negative again.

Regards

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