Salmon often jump waterfalls to reach their breeding grounds. One salmon starts 2.00m from a waterfall that is 0.55m tall and jumps at an angle of 32.0 degrees. What must be the salmon's minimum speed to reach the waterfall?

The salmon reaches the waterfall with a minimum speed of approximately 20.343 m/s

Explanation:

The given parameters are;

The horizontal distance from the waterfall where the salmon starts to jump = 2.00 m

The height of the waterfall, h = 0.55 m

The angle (to the horizontal) at which the salmon jumps, θ = 32°

From ² = 2·g·h, we have;

Where;

g = The acceleration due to gravity = 9.8 m/s²

The minimum vertical velocity required, is given as follows;

= √(2·g·h) = √(2 × 9.8 m/s² × 0.55 m) = 10.78 m/s

The minimum time, t, it will take the salmon to reach the height of the water fall is given as follows;

 = gt

t = .g = 10.78/9.8 = 1.1 seconds

The vertical velocity = u × sin(θ)

Therefore, the initial velocity, u = /sin(θ) = 10.78/(sin(32°)) ≈ 20.343 m/s

The horizontal component of the initial speed = 20.343 m/s × cos(32°) ≈ 17.252 m/s

Therefore, the horizontal distance covered in the 1.1 seconds = 1.1 × 17.252 =  18.9772 meters, which is larger than the 2.00 m distance from the waterfall, therefore, the salmon reaches the waterfall with a minimum speed of 20.343 m/s

+15-35=-20

going in opposite directions

explanation:

to push or pull an object in a certain direction is known as force. a force in moving an object from one place to another.

force depends on the mass of an object. so, more is the mass of an object more will be the force required to move the object.

thus, we can conclude that the use of force to move an object is push or pull.