physics

A red ball is thrown down with an initial speed of 1.0 m/s from a height of 27.0 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 24.5 m/s, from a height of 0.7 meters above the ground. The force of gravity due to the earth results in the balls each having a constant downward acceleration of 9.81 m/s2.

1. What is the speed of the red ball right before it hits the ground?

2. How long does it take the red ball to reach the ground?

3. What is the maximum height the blue ball reaches?

4. What is the height of the blue ball 2.0 seconds after the red ball is thrown?

5. How long after the red ball is thrown are the two balls in the air at the same height?

Which statement is true about the red ball?

The acceleration is positive and it is speeding up

The acceleration is negative and it is speeding up

The acceleration is positive and it is slowing down

The acceleration is negative and it is slowing down

  1. 👍 0
  2. 👎 0
  3. 👁 912
  1. 1. V^2 = Vo^2 + 2a*d.
    V^2 = 1^2 + 19.62*27 = 530.74
    V = 23 m/s.

    2. V = Vo + gt. t = (V-Vo)/g.
    t = (23-1) / 9.81 = 2.24 s.

    3. hmax = ho + (V^2-Vo^2)/2g.
    hmax=0.7 + (0-(24.5)^2)/-19.62= 31.3 m.

    4. h = ho + Vo*t + 0.5g*t^2.
    h=0.7+ 24.5*(2-0.6) -4.9(2-0.6)^2 = 25.39.

    1. 👍 2
    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

    asked by a on September 13, 2011
  2. 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

    asked by tani on September 8, 2009
  3. physics

    For a flourish at the end of her act, a juggler tosses a single ball high in the air. She catches the ball 3.6 s later at the same height from which it was thrown. Part A-What was the initial upward speed of the ball?2sf

    asked by ana22 on February 11, 2017
  4. physics

    a ball is thrown at an initial angle of 37 and initail velocity of 23.0 m/s reaches a maximum height h, as shwon in the Figure. With what initial speed must a ball be thrown straight up to reach the same maximum height h?

    asked by Anonymous on January 3, 2011
  5. 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

    asked by Funnyguy on January 26, 2013
  1. Physic!

    A blue ball is thrown upward with an initial speed of 23 m/s, from a height of 0.5 meters above the ground. 2.8 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 6.6 m/s from a height of

    asked by one on February 10, 2018
  2. Physics

    A quarterback throws a pass at an angle of 40 degrees above the horizontal with an initial speed of 20 m/s. The ball is caught by the receiver 2.55 seconds later. Determine horizontal velocity, vertical initial velocity, the

    asked by JoseF3 on October 4, 2015
  3. college

    A blue ball is thrown upward with an initial speed of 19.8 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

    asked by ali on September 3, 2012
  4. College algebra

    When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= -5t^2 + v*t + k gives the height of the ball at any time, t in seconds, where ā€œvā€ is the initial velocity (speed) in meters/sec and

    asked by Dimpleface on June 16, 2010
  5. physics

    A ball is thrown vertically upward with an initial speed of 20 m/s. Two seconds later, a stone is thrown vertically (from the same initial height as the ball) with an initial speed of 24 m/s. At what height above the release point

    asked by Derek on September 16, 2008

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