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A ball is thrown vetically upwards at ti...

A ball is thrown vetically upwards at time `t=0`. Air resistance is not negligible and the acceleration of free fall is `g`. The ball reaches a maximum height at time `t=T` and then descends, reaching terminal speed. Which graph best shows the variation with time `t` to the acceleration a of the ball

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
C

As the ball ascends upwards in addiction to weight air friction also acts downwards. Hence the initial magnitude of acceleration will be greater than magnitude of acceleration due to gravity. So the only possible option is
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Knowledge Check

  • A ball is projected vertically upwards. Air resistance and variation in g may be neglected. The ball rises to its maximum height H in a time T, the height being h after a time t : (1) The graph of kinetic energy E_(k) of the ball against height h is shown in figure 1 (2) The graph of height h against time t is shown in figure 2 (3) The graph of gravitational energy E_(k) of the ball against height h is shown in figure 3 (1) -Which the figure shows the correct answers ?

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