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March 2, 2015

March 2, 2015

Posted by **Zikhona** on Tuesday, September 2, 2014 at 1:01pm.

1. What is the minimum time needed to come to rest, starting from when it first touches the ground?

2. Can this plane safely land at a small airport where the landing strip is 0,80 km long?

- Maths,Physics,life science,geography, -
**Damon**, Tuesday, September 2, 2014 at 1:19pmI assume you mean Vi = 100 m/s and a = -5 m/s^2

v = Vi + a t

0 = 100 -5 t

t = 20 seconds

to go from 100 to 0 at -5m/s^2

d = Vi (20) - (1/2)(5)(20)^2

d = 100 (20) - 2.5(400)

= 2000 - 1000

= 1000 meters to stop, runs 200 meters beyond the end of the runway into the harbor where he strikes a passenger ferry.

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