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

A cliff diver,mass 75kg,free falls off a cliff that is 50m above the water surface.He hits the water surface and stops 5m under the surface.calculate:

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 11:12am
net 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

## Answer this Question

## Related Questions

- Physics - A 69 kg swimmer free-falls off a 10.0 m diving platform. The diver ...
- Physics - A 69 kg swimmer free-falls off a 10.0 m diving platform. The diver ...
- physics - A 65 kg diver jumps off of a 10.0 m tower. a. Find the diver's ...
- Physics - A diver running 1.8 m/s dives out horizontally from the edge of the ...
- physics - A 69 kg diver jumps off a 10.4 m tower. (a) Find the diver's velocity ...
- physics - A person jumps off a diving board 4.6 m above the water's surface into...
- physics - A diver jumps horizontally off a cliff with an initial velocity of 5.4...
- Physics - You like to swim at a nearby lake. On one side of the lake is a cliff...
- physics - A diver of mass m drops from a board 12 m above the water surface. ...
- physics - A 65 kg diver jumps off of a 10.0 m tower. a. Find the diver's ...