Physics

Suppose the stone is thrown at an angle of 32.0° below the horizontal from the same building (h = 49.0 m) as in the example above. If it strikes the ground 69.3 m away, find the following. (Hint: For part (a), use the equation for the x-displacement to eliminate v0t from the equation for the y-displacement.)
(a) the time of flight s

(b) the initial speed m/s

(c) the speed and angle of the velocity vector with respect to the horizontal at impact
speed m/s
angle ° below the horizontal

  1. 👍 0
  2. 👎 0
  3. 👁 298
asked by anne
  1. you know the initial horizontal velocity was


    Vh=Vicos32
    distancehoizontal=vh/time

    so time= vicos32/69.3

    hf=hi-viSin32*vicos32/69.3 -1/2 g (vicos32/69.3)^2

    or..0=69.3^2 - vi^2 sin32cos32-1/2 g vi^2 cos^2 32/69.3

    you can calulate vi from that, then go back and calculate t.

  2. can u explain it in another way

    1. 👍 0
    2. 👎 0
    posted by anne
  3. Isn't it Velocity = x/t

    1. 👍 0
    2. 👎 0
    posted by Hawk

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    Suppose the stone is thrown at an angle of 30.0 degrees below the horizontal. If it strikes the ground 57.0 m away, find (a) the time of flight, (b) the initial speed, and (c) the speed and the angle of the velocity vector with

    asked by Adam on October 14, 2015
  2. physic

    A girl throws a stone from a bridge. Consider the following ways she might throw the stone. The speed of the stone as it leaves her hand is the same in each case. Case A: Thrown straight up. Case B: Thrown straight down. Case C:

    asked by lisa on July 21, 2010
  3. physics

    Suppose a stone is thrown at an angle of 30 degrees below the horizontal, if it strikes the ground 57m away, find (a)the time of flight, (b)the initial speed, and (c) the speed and the angle of the velocity vector with respect to

    asked by Gail on October 16, 2011
  4. Physics

    Suppose the stone is thrown at an angle of 32.0° below the horizontal from the same building (h = 49.0 m) as in the example above. If it strikes the ground 69.3 m away, find the following. (Hint: For part (a), use the equation

    asked by jim on May 18, 2011
  5. Physics

    From the edge of the rooftop of a building, a boy throws a stone at an angle 24.0° above the horizontal. The stone hits the ground 4.40 s later, 104 m away from the base of the building. (Ignore air resistance.) Find the initial

    asked by Max on February 11, 2010
  6. physics

    A stone thrown off a bridge 20 m above a river has an initial velocity of 12 m/s at an angle of 450 above the horizontal. a. What is the range of the stone? b. At what velocity does the stone strike the water? (magnitude and

    asked by Val on September 26, 2010
  7. physics

    A stone is thrown from a 45.1 m cliff with a speed of 5.71 m/s at an angle of 49.5 ¡ to the horizontal. (a) What maximum height above the release point does the stone reach?

    asked by Anonymous on December 5, 2013
  8. physics

    Suppose the stone is thrown at an angle of 40.0° below the horizontal from the same building (h = 42.0m) as in the example above. If it strikes the ground 36.7 m away, find the following. (Hint: For part (a), use the equation for

    asked by mike on May 20, 2016
  9. physics

    A stone is thrown from ground level at 70m/s. Its speed when it reaches its highest point is 48 m/s. Find the angle, above the horizontal, of the stone’s initial velocity.

    asked by Anonymous on September 30, 2011
  10. physics

    From the edge of the rooftop of a building, a boy throws a stone at an angle 26.1° above the horizontal. The stone hits the ground 4.25 s later, 103m away from the base of the building (b) Find the initial velocity of the stone.

    asked by mia on September 28, 2013

More Similar Questions