Mature salmon swim upstream, returning to spawn at their birthplace. During the arduous trip they leap vertically upward over waterfalls as high as 2.75 m. With what minimum speed (in m/s) must a salmon launch itself into the air to clear a 2.75-m waterfall?

An attacker at the base of a castle wall 3.60 m high throws a rock straight up with speed 7.50 m/s from a height of 1.60 m above the ground. a) what is its speed at the top? If not, what initial speed must it have to reach the top? b) Find the change in speed of a rock thrown straight down from the top of the wall at an initial speed of 7.50 m/s and moving between the same two points. c) Does the change in speed of the downward-moving rock agree with the magnitude of the speed change of the rock moving upward between the same elevations? d) Explain physically why it does or does not agree.

mature salmon swim upstream, returning to spawn at their birthplace. during their arduous trip, they leap vertically upward over waterfalls as high as 3.31m. with what minimum speed (in m/s) must a salmon launch himself into the air to clear a 3.31-m waterfall?

Mature salmon swim upstream, returning to spawn at their birthplace. During the arduous trip they leap vertically upward over waterfalls as high as 3.17 m. With what minimum speed (in m/s) must a salmon launch itself into the air to clear a 3.17-m waterfall?