Question

A person falls from rest at a height of five meters. Their mass is 70kg. When they land the impact has a duration of 0.1 seconds. What forces was developed on impact

Answer 1

Answer on Question #70331-Physics-Other

A person falls from rest at a height of five meters. Their mass is 70kg. When they land the impact has a duration of 0.1 seconds. What forces was developed on impact

Solution

The velocity before impact is

$$v = \sqrt {2 g h}.$$

The force is

$$F = \frac {m v}{t} = \frac {m \sqrt {2 g h}}{t} = \frac {7 0 \sqrt {2 (9 . 8) 5}}{0 . 1} = 6 9 3 0 N.$$

Answer: 6930 N.

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