Physics

Salmon often jump waterfalls to reach their breeding grounds. One salmon starts 2m from a waterfall that is 0.55m tall and jumps at an angle of 32°. What must be the salmon's minimum speed to reach the waterfall?

  1. 👍
  2. 👎
  3. 👁
  1. The range R of the jump must be R = 4m, if the waterfall were not there. That correspopnds to a distance to maximum height (the waterfall top) of 2 m.

    Using the equation for range:
    (R/2) = (1/2)*Vo^2*sin(2A)/g = 2 m
    Vo^2 = 21.8 m/s
    Vo = 4.7 m/s

    A is the launch angle. It gets doubled because 2sinA*cosA = sin(2A) appears in the equation for R.

    1. 👍
    2. 👎
  2. 4.67

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    Salmon often jump waterfalls to reach their breeding grounds. Starting 2.00 m from a waterfall 0.55 m in height, at what minimum speed must a salmon jumping at an angle of 32.0 degrees leave the water to continue up stream? help

  2. physics again

    A Chinook salmon has a maximum underwater speed of 3.58 m/s, but it can jump out of water with a speed of 6.26 m/s. To move upstream past a waterfall, the salmon does not need to jump to the top of the fall, but only to a point in

  3. Science

    which of the following statements best describes the energy of a waterfall? A) The water has Kinetic energy because of its position at the top of the water fall B)potential Energy changes to Kinetic Energy as the waterfalls.

  4. physics

    The tension at which a fishing line snaps is commonly called the line's "strength." What minimum strength is needed for a line that is to stop a salmon of weight 85 N in 11.0 cm if the fish is initially drifting at 2.8 m/s? Assume

  1. Physics

    A Chinook (King) salmon (Genus Oncorynchus) can jump out of water with a speed of 6.75 m/s. If the salmon is in a stream with water speed equal to 1.65 m/s, how high in the air can the fish jump if it leaves the water traveling

  2. science

    Which would be a pair of ecological equivalents? zooplankton andsea anemone salmon and seagull rattlesnake and desert rat elephant and hyena zebra and wild horse

  3. Bio

    A chinook salmon fish in alaska can produce between 2000 to 17000 eggs in a single spawning. Which principle of natural selection does this observation support? A.Overproduction B.Inherited variation C.struggle to survive

  4. trigonometry

    From the top of the waterfalls, the angles of depression of the foot and the top of the tree are 39° and 24° , respectively. If the tree is 3 m from the foot of the waterfalls, how high is the waterfalls??

  1. Math

    Sarah competes in a long jump competition. Her first jump is 4.25m. Her best jump is 12% more than this. However, her best jump is 15% lower than the winning jump. Work out the length of the winning jump.

  2. world geography

    What was a result of efforts by the U.S. and Canadian governments to improve water quality? A.increased hydroelectric power B.a depletion of several salmon species C.the resurgence of some fish populations D.increased sugar maple

  3. Trig

    Morana is trolling for salmon in Lak Ontario. She sets the fishing rod so its tip is 1 m above the water and the line enters the water at an angle of 45 degrees. Fish have been tracked at a depth of 45km. What length of line must

  4. Physics

    Salmon often jump waterfalls to reach their breeding grounds. Starting downstream, 3.34 m away from a waterfall 0.634 m in height, at what minimum speed must a salmon jumping at an angle of 26.7 ◦ leave the water to continue

You can view more similar questions or ask a new question.