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December 22, 2014

December 22, 2014

Posted by **Themba** on Tuesday, July 22, 2014 at 11:06am.

4.1 The net force while free falling.

4.2 The divers' velocity when he reaches the water surface.

4.3 calculate the time it takes the water to stop the diver.

- physical sciences -
**bobpursley**, Tuesday, July 22, 2014 at 11:12amnet force when falling= zero

velocity at water hit: 1/2 m v^2=mg*50

v= sqrt(100g)

time to stop in water is rather complicated, unless you assume the acceleration is constant at hitting until stopping (a ridiculous assumption), and that force is constant (another ridiculous assumption).

With those assumptions

Vf^2=Vi^2+2ad where a= force/mass

solve for force

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