Question

A Body Freely Falling From Height H Describe 11H/36 In The Last Second Of Its Fall. The Height H Is(G=10Ms-20)

Answer 1

Answer:180m

Explanation:

Time taken to fall from height h to the ground under gravity

t=root of2h/g .......1

In time (t-1) it travels .... h-11h/36

=25h/36

Therefore in t-1=root of 2×25h/36g

On taking ratio we get t/t-1

So, root of 25/36=5/6

So t=5sec

Substitute t value

5=root of2h/g

=36×10/2

=180m

So height h is 180m

Answer 2

Answer:

180m

Explanation:

Time taken to fall from height h to the ground under gravity

t=root of2h/g                                                              1

In time (t-1) it travels ....                                              h-11h/36

=25h/36

Therefore in

t-1=root of 2×25h/36g

On taking ratio we get t/t-1

So,

root of 25/36=5/6

So

t=5sec

Substitute t value

5=root of2h/g

=36×10/2

=180m

So height h is 180m