conceptual science

posted by .

In the absence of air resistance, a ballplayer tosses a ball
straight up.
(a) By how much does the speed of the ball decrease
each second while it is ascending?
(b) By how much does its speed increase each second
while it is descending?
(c) How does the time of ascent compare with the time
of descent?

  • conceptual science -

    a. V = Vo-g*t
    V = Vo-9.8m/s^2*1s
    V = Vo-9.8m/s. s.

    The speed decreases by 9.8 m each second.

    b. V = Vo + g*t
    V = Vo + 9.8m/s^2*1s
    V = Vo + 9.8m/s.
    The speed increases by 9.8 m each second.

    c. V = Vo + g*t = 0 @ max. ht.
    Vo + g*t = 0
    Vo - 9.8t = 0
    9.8t = Vo
    Tr = Vo/9.8 = Rise time=Time of ascent.

    V = Vo + g*t
    V = 0 + 9.8*t
    Tf = V/9.8
    V = Vo during ascent.
    Therefore, Tf = Vo/9.8 = Tr.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. SCIENCE!!

    a. When a ball is thrown straight up, by how much does the speed decrease each second?
  2. SCIENCE!!

    a. When a ball is thrown straight up, by how much does the speed decrease each second?
  3. SCIENCE!!

    a. When a ball is thrown straight up, by how much does the speed decrease each second?
  4. physics

    A .15kg ball is dropped from a height of 14 m to the ground below, and hits the ground with a speed of 12 m/s. With what speed would the ball have hit the ground if there were no air resistance?
  5. Physics

    A circus performer juggling while standing on a platform 15.0-m high tosses a ball directly upward into the air at a speed of 2.0 m/s. If it leaves his hand 0.5 m above the platform, what is the ball's maximum altitude?
  6. Physics

    I fire a tennis ball from an air cannon, straight up from ground level, at initial speed v0. At the instant it reaches the top of its trajectory, I fire a second tennis ball at the same initial speed. Air resistance is negligible. …
  7. Physics

    I fire a tennis ball from an air cannon, straight up from ground level, at initial speed v0. At the instant it reaches the top of its trajectory, I fire a second tennis ball at the same initial speed. Air resistance is negligible. …
  8. physics

    Hakeem throws a 11.0 g ball straight down from a height of 2.0 m. The ball strikes the floor at a speed of 7.8 m/s. What was the initial speed of the ball?
  9. Health-Ms. Sue

    Coach Downey had his team practice bunting while working on basic fundamentals. Nearly all of the bunts were reaching the fielders so quickly that the base runners were easily thrown out before they could advance. Coach Downey emphasized …
  10. Physics I

    A ball has been thrown upward. Which of the following is true while the ball is on the way up, after the ball has been released, assuming no air resistance?

More Similar Questions