Question

In: Physics

A person jumps upward off a diving board at 6.0 m/s and hits the water 2.0...

A person jumps upward off a diving board at 6.0 m/s and hits the water 2.0 seconds later (including the up and down time). About how fast will she be going just before she hits the water?

Expert Solution

Initial vertical velocity,

Total time of flight,

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First, find the time taken to reach the maximum height above the diving board

Consider the vertical motion of the person

At the max height, vertical velocity becomes zero.

Use formula

The person is going up and g is acting downwards, so put a negative sign for g.

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Time to hit water after falling from max height = Total time of flight - Time to reach max height

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Consider the vertical motion of the person

Use formula

The person is going down and g is acting downwards, so g is positive.

ANSWER:

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genius_generous answered 3 hours ago

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