Question 155: Motion in 1D

Question

Two bodies A (of mass 1 kg) and B (of mass 3 kg) are dropped from heights of 16 m and 25 m, respectively. The ratio of the time taken by them to reach the ground is

Accepted Answer

Here h = $${1 \over 2}g{t^2}$$
For body A, 16 = $${1 \over 2}gt_1^2$$
For body B, 25 = $${1 \over 2}gt_2^2$$
$$ 	herefore $$ $${{16} \over {25}} = {{t_1^2} \over {t_2^2}}$$
$$ \Rightarrow $$ $${{{t_1}} \over {{t_2}}} = {4 \over 5}$$

Answer

4/5

Answer

5/4

Answer

12/5

Answer

5/12

Motion in 1D

Two bodies A (of mass 1 kg) and B (of mass 3 kg) are dropped from heights of 16 m and 25 m, respectively. The ratio of the time taken by them to reach the ground is

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