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## Main Question or Discussion Point

i have solved the question of a pebble thrown upwards without air resistance

speed 10m/s mass 0.02kg ma=w, w=-mg

man on cliff 50 feet high throws pebble upwards so it finishes in sea,

what height does it reach v=0 t = 10/g approx =1

since motion started at t =0 & duration of time 1s

x = 100/g - 100/2g is approx 5.1m so maximum height 55.1 m

BUT

i now need to find height with air resistance 0.008 v

any pointers to x value warmly recieved

cheersjk

speed 10m/s mass 0.02kg ma=w, w=-mg

man on cliff 50 feet high throws pebble upwards so it finishes in sea,

what height does it reach v=0 t = 10/g approx =1

since motion started at t =0 & duration of time 1s

x = 100/g - 100/2g is approx 5.1m so maximum height 55.1 m

BUT

i now need to find height with air resistance 0.008 v

any pointers to x value warmly recieved

cheersjk