Kinematics Question 417

Question: A body is thrown upwards. If air resistance causing deceleration of 5m/s2 , then ratio of time of ascent to time of descent it’s [takeg=10m/s2]

Options:

A) 12

B) 12.5

C) 13

D) 15

Show Answer

Answer:

Correct Answer: C

Solution:

  Time of ascentTime of descent=(ug+a)u(g+a)(ga)

=(g+a)(ga)g+a=(ga)g+a

=10510+5=515=13



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