physics

a ball is thrown upward from a bridge with a speed of 48 ft/s. It misses the bridge on way down and lands in water 160 ft. below. Find how long the ball rises, how high it goes, how long it is in the air, and its velocity when it strikes the water?

  1. 👍 0
  2. 👎 0
  3. 👁 85
asked by sophie
  1. h(t) = 160 + 48t - 16t^2
    v(t) = 48 - 32t
    See what you can do with that.

    1. 👍 0
    2. 👎 0
    posted by oobleck
  2. 1. V = Vo + g*Tr = 0.,
    48 + (-32)Tr = 0,
    Tr36 + = 1.5 s. = Rise time.

    2. V^2 = Vo^2 + 2g*h = 0.
    48^2 + (-64)h = 0,
    h = 36 ft.

    3. h = 0.5g*Tf^2 = 36 + 160.
    16*Tf^2 = 196,
    Tf = 3.5 s. = Fall time.
    Tr + Tf = 1.5 + 3.5 = 5.0 s. = Time in air.

    4. V = Vo + g*Tf = 0 + 32*3.5 =

    1. 👍 0
    2. 👎 0
    posted by henry2,

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    a ball is thrown upward from a bridge with a speed of 48 ft/s. It misses the bridge on way down and lands in water 160 ft. below. Find how long the ball rises, how high it goes, how long it is in the air, and its velocity when it

    asked by mia on September 26, 2016
  2. Physics

    A stone is thrown upward from a bridge at a speed of 10 m/s. It narrowly misses the bridge on the way back down, and hits the water at 30m/s. what is the approximate height of the bridge?

    asked by Anonymous on July 8, 2014
  3. physics

    two students are on a balcony 20.6 m above the street. One student throws a ball vertically downward at 14.7 m/s. At the same instant, the other student throws a ball vertically upward at the same speed. The second ball just

    asked by fsfsf on March 2, 2011
  4. physics

    two students are on a balcony 20.6 m above the street. One student throws a ball vertically downward at 14.7 m/s. At the same instant, the other student throws a ball vertically upward at the same speed. The second ball just

    asked by fsfsf on March 2, 2011
  5. physics

    Two golf balls are thrown with the same speed off the top of a large bridge at the same time. Ball A is thrown straight downward, and Ball B is thrown horizontally off the bridge. Which ball hits the ground first?

    asked by cammi on July 29, 2013
  6. physics

    A ball is thrown straight upward and returns to the thrower's hand after 2.00 s in the air. A second ball thrown at an angle of 40.0° with the horizontal reaches the same maximum height as the first ball. (a) At what speed was

    asked by lisa on February 4, 2016
  7. physic

    A ball is thrown straight upward and returns to the thrower's hand after 2.00 s in the air. A second ball thrown at an angle of 40.0° with the horizontal reaches the same maximum height as the first ball. (a) At what speed was

    asked by mark on February 3, 2016
  8. general physics

    Assume acceleration due to gravity=10 m/s. A ball is thrown vertically upward from top of a building with speed of 20 m/s. On the way back ball misses the building and lands on the ground. Total time the ball is in air is 6

    asked by mark matat on February 14, 2011
  9. physics

    Assume acceleration due to gravity=10 m/s. A ball is thrown vertically upward from top of a building with speed of 20 m/s. On the way back ball misses the building and lands on the ground. Total time the ball is in air is 6

    asked by Mark on February 14, 2011
  10. physics

    A ball is thrown straight upward and returns to the thrower's hand after 2.75 s in the air. A second ball thrown at an angle of 34.0° with the horizontal reaches the same maximum height as the first ball. (a) At what speed was

    asked by randy on June 5, 2018

More Similar Questions