Q.13. A ball is thrown vertically upwards in air. If the air resistance cannot be neglected (assume it to be
directly proportional to velocity), then the acceleration of the ball at the highest point will be:
(1) 0
(2) g
(3) > g
(4) < g

Dear Student,
                        At the highest point the velocity becomes zero. So at this point there will be no air resistance hence the acceleration due to gravity will be equal to 'g'.

So, the correct option is (2).

Regards

 

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Option (b) .
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