Mature salmon swim upstream, returning to spawn at their birthplace. During the arduous trip they leap vertically upward over waterfalls as high as 2.83 m. With what minimum speed (in m/s) must a salmon launch itself into the air to clear a 2.83-m waterfall?

Please don't provide handwritten solution...   A rescue helicopter is hovering over a person whose boat has sunk. One of the rescuers throws a life preserver straight down to the victim with an initial velocity of 1.50 m/s and observes that it takes 2.3 s to reach the water. How high (in m) above the water was the preserver released? Note that the downdraft of the helicopter reduces the effects of air resistance on the falling life preserver, so that an acceleration equal to that of gravity is reasonable.   ____m

An attacker at the base of a castle wall 3.55 m high throws a rock straight up with speed 8.30 m/s from a height of 1.60 m above the ground. (a) Will the rock reach the top of the wall? Yes O No (b) If so, what is its speed at the top? If not, what initial speed must it have to reach the top? m/s (c) Find the change in speed of a rock thrown straight down from the top of the wall at an initial speed of 8.30 m/s and moving between the same two points. m/s (d) 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? O Yes No (e) Explain physically why it does or does not agree.

A juggler throws a beanbag straight up into the air with initial speed 6.00 m/s. The beanbag leaves the juggler's hand 1.50 m above the floor. The juggler fails to catch the beanbag as it falls to the floor. (a) How long is the beanbag in the air? (b) What is its impact speed?

A skateboarder decides to try to jump from the top of a set of stairs and land at the bottom. She leaves the top of the stairs with a horizontal velocity of 15.0 m/s. If the top of the stairs is 2.0 m high, what will her horizontal displacement be?

Your little sister is running to the park in your neighborhood at a speed of 3.90 m/s when you suddenly realize she left her favorite playground ball behind. You throw her ball horizontally out the window of your apartment which is at a height of 45.0 m above the street and directly above the sidewalk. You throw the ball 8.00 seconds after she has passed below your window and she catches the ball! a) Ignoring air resistance, what is the initial speed that you must throw her ball so she can catch it just before it reaches the ground? b) How far down the sidewalk from the window is your sister when she catches her ball?

A juggler throws a bowling pin straight up with an initial speed of 9.6 m/s from an initial height of 1.3 m. How much time elapses until the bowling pin returns to the same initial height?

A ball is thrown upward from roof top, 90 m above the ground. The ball rises, then falls and hits the ground. Ignore air resistance. a) What is the initial velocity of the ball, if it takes the ball 9.4 s to hit the ground? b) What is the maximum height reached by the ball?

A ball is thrown straight up with initial speed 15.0 m/s and rises 11.5 m above the release point before returning to Earth. What initial velocity is required to make the ball rise twice as high? Ignore any effects due to air resistance.

An object is propelled upwards, from level ground, in the vertical, with an initial velocity of 20 m/s.  What is the maximum height, in meters, it reaches?