physics

A ball is thrown upward from a platform 4.5 m high with a speed of 17 m/s at an angle of 41 o from the horizontal. What is the magnitude of its velocity when it hits the ground?

  1. 👍 0
  2. 👎 0
  3. 👁 132
  1. Vo = 17m/s @ 41deg.

    Vo(h) = 17cos41 = 12.8m/s.

    Vo(v) = 17sin41 = 11.15m/s.

    Vf^2 = Vo^2 + 2gd = 0.
    (11.15)^2 + (-19.6)d = 0,
    124.32 - 19.6d = 0,
    -19.6d = -124.32,
    d2 = 6.34m = distance above the platform.

    d = d1 + d2,
    d = 4.5 + 6.34 = 10.84m = Distance above ground.

    Vf^2 = Vo^2 + 2gd,
    Vf^2 = 0^2 + 2*(-9.8)*10.84 = 212.52,
    Vf = 14.6m/s = Final velocity.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. phy

    A blue ball is thrown upward with an initial speed of 20.6 m/s, from a height of 0.8 meters above the ground. 2.5 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 8.2 m/s from a height of

  2. Physics

    A red ball is thrown down with an initial speed of 1.3 m/s from a height of 28.0 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 24.7 m/s, from a

  3. science

    a ball is thrown straight upward and returns to the thrower's hand after 3.00s in the air. A second ball is thrown at an angle of 30.0 deg with the horizontal. At what speed must the second ball be thrown so that it reached the

  4. physics

    A ball is thrown upward at a speed v0 at an angle of 52.0˚ above the horizontal. It reaches a maximum height of 7.3 m. How high would this ball go if it were thrown straight upward at speed v0?

  1. science

    The acceleration of gravity on the surface of Venus is 8.9m/s^2. Would a ball thrown upward on Venus return to the ground sooner or later than a ball thrown upward with the same speed on the earth?

  2. math

    a ball is thrown upward at 64 feet per second from the top of an 80 feet high building. The height of the ball can be modeled by S(t) = -16t^2 + 64t + 80(feet), where t is the number of seconds after the ball is thrown. describe

  3. physics

    An entertainer juggles balls while doing other activities. In one act, she throws a ball vertically upward, and while it is in the air, she runs to and from a table 5.20m away at a constant speed of 2.40m/s, returning just in time

  4. physical science

    the acceleration of gravity on the surface of venus is 8.9 m/s2. would a ball thrown upward from venus return to the ground sooner or later than a ball thrown upward with the same speed on the earth?

  1. physics

    When baseball players throw the ball in from the outfield, they sometimes allow it to take one bounce before it reaches the infield on the theory that the ball arrives sooner that way. Suppose the angle at which a bounced ball

  2. Physics

    A 58.7-kg lead ball is dropped from the Leaning Tower of Pisa. The tower is 55.0 m high. A) How far does the ball fall in the first 3.08 seconds of flight? = 46.5 m B) What is the speed of the ball after it has traveled 2.10 m

  3. Physics

    A blue ball is thrown upward with an initial speed of 19.6 m/s, from a height of 0.5 meters above the ground. 2.4 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 7.9 m/s from a height of

  4. Physics

    A ball is thrown upward at a speed v0 at an angle of 57.0˚ above the horizontal. It reaches a maximum height of 7.4 m. How high would this ball go if it were thrown straight upward at speed v0?

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