00:02
Hello everyone we are going to understand this question here given in the question given height of dive platform height of diver platform h is equal to 70 feet or in meter it is 21 .3 meter speed of water speed of water v is equal to 56 ms meal per hour or we can write v is equal to 25 meter per second now for part a using third law of motion so we can write a is equal to for part a now using third law of motion using third law of motion so we can write v square is equal to u square plus 2 gh now we can write v square is equal to initial speed is 0 plus 2 into 9 .8 into value of h.
02:04
That is 21 .3.
02:08
So we can write v square is equal to, sorry, taking the square root, so we can write v is equal to square root of 417 .48 meter per second.
02:27
Now doing further calculation we will get v is equal to 20 .43 meter per second.
02:44
So required claim is so required claim is incorrect.
02:57
Required claim is incorrect.
03:08
Here final velocity we have calculated 20 .43 meter per second but that is given in the question 21.
03:18
That is incorrect.
03:20
Now solving for part b.
03:23
Here final velocity v is given 25 meters per second.
03:34
Let the required initial speed be u.
03:37
Let the required initial speed the required initial speed be u.
03:56
Now using third law of motion v square is equal to u square plus 2 g into h...