physics

A ball is projected horizontally from the edge of a table that is 1.15 m high, and it strikes the floor at a point 1.70 m from the base of the table.
(a) What is the initial speed of the ball?


m/s
(b) How high is the ball above the floor when its velocity vector makes a 45.0° angle with the horizontal?


m

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩
  1. h = Vo*t + 0.5g*t^2 = 1.15m,
    0 + 4.9t^2 = 1.15,
    t^2 = 0.235,
    t = 0.484s = Time in flight.

    a. Dh = Xo * t = 1.70m, = Hor distance.
    0.484Xo = 1.70,
    Xo = 3.5m/s. = Initial hor velocity.

    b. tan45 = Y/Xo,
    Y = Xo*tan45 = 3.5 * 1 = 3.5m/s = ver.
    comp. of velocity.

    d = (Vf^2 - Vo^2) / 2g.
    d = ((3.5)^2 - 0) / 19.8 = 0.625m.
    h = 1.15 - 0.625 = 0.525m. above the floor.

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  2. hhgd

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  3. hello it is me boris

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩

Respond to this Question

First Name

Your Response

Similar Questions

  1. science

    A ball rolls off the edge of a tabletop and then lands on the floor 80 cm away from the base of the table. if the table is 1.20 high what is the initial velocity?

  2. physics

    A steel ball rolls with constant velocity across a tabletop 0.950m high. IT rolls off and hits the ground +0.352m horizontally from the edge of the table. How fast was the ball rolling?

  3. Physics Honors

    A soccer ball is kicked horizontally off a 22.0 meter high hill and lands a distance of 35 meters from the edge of the hill. Determine the initial horizontal velocity of the soccer ball.

  4. Science

    a ball is rolled off the edge of a dining table 1.5 m high with a horizontal velocity of 2.2 m/s with what velocity does it strike the ground? How far from the edge of the table did it land on the floor?

  1. Science, Physics, math, calculus

    Pool players often pride themselves on their ability to impart a large speed on a pool ball. In the sport of billiards, event organizers often remove one of the rails on a pool table to allow players to measure the speed of their

  2. physics

    a ball rolls off the edge of a tabletop 1m above the floor and strikes the floor at a point 1.5m horizontally from the edge of the table. Find the (a) time of flight (b) initial velocity, (c) final velocity just before it strikes

  3. Physics

    A ball rolls off the edge of a 0.75m high lab table with a horizontal speed of 1.50 m/s. Calculate the time that the ball is in flight, calculate the vertical velocity of the ball just before striking the floor, and calculate the

  4. Physics

    A ball rolls over the edge of a table with a horizontal velocity v m/s. the height of the table is 2.1m and the horizontal range of the ball from the base of the table is 16m. What is the initial speed of the ball?

  1. Math

    A man throws a ball horizontally from the top of a hill 4.9m high. He wants the ball to clear a fence 2.4m high standing on horizontal surface and 8m horizontally away from the point of projection. Find the minimum speed at which

  2. college physics

    tennis ball rolls off the edge of a tabletop 0.900m above the floor and strikes the floor at a point 1.60m horizontally from the edge of the table. A: Find the time of flight of the ball B: Find the magnitude of the initial

  3. Physics

    A ball is rolling on a table with a horizontal velocity of 5 m/s when it rolls off the edge. How far from the base of the table does the ball land in the table is 0.8 m tall?

  4. physics

    A ball moving at a speed of 2.0 m/s rolls off a horizontal table. If the table is 1.2 m high, how far does the ball travel horizontally in m when it strikes the floor

View more similar questions or ask a new question.