A salmon jumps up a waterfall 2.4 m high. With what minimum speed did the salmon leave the water below to reach the top?

6.86 m/s

Explanation:

From the equations of motion we have

The minimum speed required for the salmon to reach the height of 2.4 m is 6.86 m/s assuming the salmon is going straight up.

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

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