Question

Help please with details?

Answer 1

`B.` `10m`

Explanation:

Here considering free fall,that is downwards motion was solely due to the effect of gravity,we can apply law of conservation of energy.

Now,total energy of the diver was constant.

Just before jumping he had purely potential energy i.e `mgh` where `m` is his mass and `h` is the height above water.

While hitting the water,he had purely kinetic energy i.e `5000J`

So,we can say,

`mgh=5000`

Or, `h=5000/(50×10)=10m` (taking, `g=10ms^-2`)