college physics

posted by .

A ball is thrown from a 20.0m high building and hits the ground 6.0m from the building. With what horizontal velocity was it thrown?

  • college physics -

    h = ho - (Vo*t + 0.5g*t^2) = 0.
    20 - (0 + 4.9t^2) = 0
    20 - 4.9t^2 = 0
    -4.9t^2 = -20
    t^2 = 4.08
    Tf = 2.02 s. = Fall time.

    Range = Xo * Tf = 6 m.
    Xo*2.02 = 6
    Xo = 2.97 m/s. = Initial hor. velocity.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    A ball is thrown at an angle of 37.1degrees above the horizontal from a point on the top of a building and 60m from the edge of the building. It just misses the edge of the building and continues on towards the ground. The building …
  2. physics

    A ball is thrown from the top of a building upward at an angle of 66 ◦ to the horizontal and with an initial speed of 16 m/s. The ball is thrown at a height of 53 m above the ground and hits the ground 33.2074 m from the base …
  3. phy

    A ball is thrown from the window of a high-rise building with an initial velocity of 6.1 m/s at an angle of 32 deg. below the horizontal. The bill strikes the ground 4.4 seconds after being thrown. Find the height from which the ball …
  4. physical

    A ball is thrown from the window of a high-rise building with an initial velocity of 7.7 m/s at an angle of 34 deg. below the horizontal. The bill strikes the ground 4.2 seconds after being thrown. Find the height from which the ball …
  5. Physics

    A ball is thrown from a building standing 30m high, landing 10m away from the building 3.2 seconds after it was thrown. Find the angle above the horizontal and the initial velocity of the ball
  6. Physics

    Hypothetically, you are standing on the balcony of an apartment on the 10th level of a building and you throw a ball at some angle,รจ , above the horizontal away from the building. the ball lands on the ground 10m from the building, …
  7. Physics

    HELP PLEASE. Hypothetically, you are standing on the balcony of an apartment on the 10th level of a building and you throw a ball at some angle, 0 , above the horizontal away from the building. the ball lands on the ground 10m from …
  8. Physical Science

    Four balls are taken to the top of a building. Ball 1 is dropped (zero initial velocity). Ball 2 is thrown straight up with a velocity of 3 m/s. Ball 3 is thrown straight out with a horizontal velocity of 3 m/s. Ball 4 is thrown straight …
  9. physics

    a ball is thrown horizontally from the top of a building 35m. high. the ball strikes the ground at a point 80m from the base of the building. a. find the time the ball is in flight b. its initial velocity c. the x and y components …
  10. Physics

    A ball thrown horizontally from the top of a 13m high building strikes the ground 5m from the base of the building. 1) With what velocity was the ball thrown?

More Similar Questions