Physics

posted by .

1) A fish jumps out of the water with a speed of 6.36 m/s. If the fish is in a stream with water speed = to 1.5 m/s, how high can the fish jump if it leaves the water traveling vertically upwards relative to the earth?

2)A ball is thrown by someone on a train moving at 10 m/s on a horizontal track with a path that they judge to be 60 degrees with the horizontal and to be in line with the track. Someone on the ground nearby observes the ball to rise vertically. How high does it rise?

  • Physics -

    The horizontal velocity component has nothing to do with how high either object goes. Just solve the vertical problems once you find the vertical speed.
    a = -g = -9.8 m/s^2
    v = Vo - 9.8 t
    h = Vo t - 4.9 t^2
    at the top, v = 0 so
    t = Vo/9.8 at the top
    h = (1/2) Vo^2/9.8 = Vo^2/ 19.6
    so for problem 1
    the horizontal component of speed = 1.5 = 6.36 cos A where A is the angle it leaves the water at.
    so A = cos^-1 (1.5/3.6) = 65.4 degrees
    so the vertical component of speed is
    Vo = 6.36 sin 65.4 = 5.78 m/s
    use that to get h
    ===========================
    for problem 2
    call the speed of the ball S
    the horizontal component of velocity is:
    10 = S cos 60
    S =20 m/s
    so the vertical component of S is
    Vo = 20 sin 60 = 17.3 m/s
    so the vertical component of S

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    A bird is flying with a speed of 18.0 m/s over water when it accidently drops a 2.00 kg fish. If the altitude of the bird is 5.40 m and the friction is disreguarded,what is the speed of the fish when it hits the water?
  2. AP physics

    Suppose a Chinook salmon needs to jump a waterfall that is 1.50 m high. If the fish starts from a distance 1.00 m from the base of the ledge over which the waterfall flows, find the x- and y-components of the initial velocity the salmon …
  3. 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 vertically …
  4. physics

    A bird is flying with a speed of 12.0 m/s over water when it accidentally drops a 2.30 kg fish. The acceleration of gravity is 9.81 m/s2 . If the altitude of the bird is 8.20 m and air resistance is disregarded, what is the speed of …
  5. physics

    A Chinook (King) salmon (Genus Oncorynchus) can jump out of water with a speed of 5.95 m/s. (See Problem 4.9, page 111 for an investigation of how the fish can leave the water at a higher speed that it can swim underwater.) If the …
  6. physics

    A Chinook (King) salmon (Genus Oncorynchus) can jump out of water with a speed of 5.95 m/s. (See Problem 4.9, page 111 for an investigation of how the fish can leave the water at a higher speed that it can swim underwater.) If the …
  7. physics

    A Chinook salmon has a maximum underwater speed of 3.0 m/s, and can jump out of the water vertically with a speed of 4.8 m/s. A record salmon has a length of 1.5 m and a mass of 62 kg. When swimming upward at constant speed, and neglecting …
  8. math

    A fisherman has caught a 5kg fish with a line and is lifting it vertically out of the water. While the fish is still in the water he raises it at a constant speed of 0.4 ms^-1. If the water resists this motion with a force of 6N, what …
  9. Physics

    The Asian Silver Carp is an invasive species of fish which has infested a number of American rivers. The disturbance of passing boats has been known to make these fish leap large distances out of the water. One such fish leaps with …
  10. calculus

    An angler has a fish at the end of his line, which is being reeled in at the rate of 2 feet per second from a bridge 30 feet above the water. At what speed is the fish moving through the water towards the bridge when the amount of …

More Similar Questions